Strategic Infrastructure

Hydropower

Hydropower covers the generation of electricity from water, including conventional powerhouses, run-of-river and small hydro schemes, and pumped-storage plants. One of the capabilities of Energy Infrastructure.

International families: 4,1042015 to 2024
Leading country: China1.4× the next
All families: 46khome filings included
Over five years: Steady2020 to 2024 against the five before

Year by year

Patent families by country of origin and the year of the earliest filing, 2000 to 2025; 2025 is a part year, still filling in. International families are those for which protection was sought beyond one country.

Volume

International patent families in the capability, by the year of the earliest filing.

Source: Global Institute for National Capability (GINC), 2026. Underlying patents from 107 patent offices, IFI CLAIMS and Google

Share by country

Each country's share of the year's international families, in per cent: the capability's five largest countries of origin, 2015 to 2024, and the rest of the world.

Source: Global Institute for National Capability (GINC), 2026. Underlying patents from 107 patent offices, IFI CLAIMS and Google

Country leaderboard

International patent families, 2015 to 2024, by country of origin. Growth compares the latest five full years with the five before.

Ten largest

China

United States

Japan

South Korea

Germany

France

United Kingdom

Italy

Taiwan

Canada

849

601

301

249

242

202

116


1	China	849	20.7%	2.4×	32,333
2	United States	601	14.6%	1.2×	1,232
3	Japan	301	7.3%	0.5×	1,813
4	South Korea	249	6.1%	0.5×	2,163
5	Germany	242	5.9%	0.7×	581
6	France	202	4.9%	0.6×	347
7	United Kingdom	202	4.9%	1.0×	330
8	Italy	116	2.8%	1.4×	250
9	Taiwan	92	2.2%	0.6×	389
10	Canada	89	2.2%	0.9×	163
11	Norway	88	2.1%	1.0×	148
12	India	78	1.9%	0.8×	97
13	Türkiye	78	1.9%	1.2×	197
14	Sweden	73	1.8%	0.7×	96
15	Spain	67	1.6%	0.8×	156
16	Australia	66	1.6%	1.5×	127
17	Switzerland	48	1.2%	1.3×	79
18	Netherlands	39	1.0%	0.9×	60
19	Finland	39	1.0%	0.6×	58
20	Austria	39	1.0%	2.0×	59
21	Israel	37	0.9%	0.8×	60
22	Ireland	37	0.9%	1.1×	45
23	Denmark	35	0.9%	2.2×	39
24	Brazil	31	0.8%	1.1×	168
25	Russia	30	0.7%	0.4×	4,122
26	Saudi Arabia	19	0.5%	1.1×	30
27	Singapore	17	0.4%	1.1×	19
28	Belgium	16	0.4%	1.7×	23
29	Poland	16	0.4%	1.0×	171
30	Portugal	11	0.3%	0.6×	21
31	Mexico	10	0.2%	0.4×	37
32	Czechia	9	0.2%	3.5×	25
33	South Africa	8	0.2%	0.6×	10
34	Malaysia	8	0.2%	1.0×	17
35	New Zealand	7	0.2%	1.3×	9
36	Hungary	6	0.1%	0.5×	28
37	Luxembourg	5	0.1%	4.0×	5
38	Hong Kong	3	0.1%	2.0×	7

Applicants

The largest applicants by international patent families, 2015 to 2024: across the world, then within each of the five countries with the most families in Hydropower. Names are as held in the source and are not consolidated across subsidiaries.

Global

4,104 international families

VOITH PATENT GMBH · Germany

NTN TOYO BEARING CO LTD · Japan

GE RENEWABLE TECH · France

LONE GULL HOLDINGS LTD · United States

UNIV DALIAN TECH · China

TOSHIBA CORP · Japan

China

849 international families

UNIV DALIAN TECH

DEC DONGFANG ELECTRIC MACH CO

CHINA THREE GORGES CORP

DONGFANG ELECTRIC MACHINERY CO LTD

HUANENG LANCANG RIVER HYDROPOWER CO LTD

UNIV JIANGSU SCIENCE & TECH

United States

601 international families

LONE GULL HOLDINGS LTD

HALLIBURTON ENERGY SERVICES INC

OBERMEYER HENRY K

GEN ELECTRIC

OSCILLA POWER INC

POWER8 TECH INC

Japan

301 international families

NTN TOYO BEARING CO LTD

TOSHIBA CORP

TOSHIBA KK

TOSHIBA ENERGY SYSTEM & SOLUTION CORP

KK BELLSION

CHUGOKU ELECTRIC POWER

South Korea

249 international families

INGINE INC

KOREA INST OCEAN SCI & TECH

JUNG MIN SHY

SUNG YONG JUN

HYUNDAI MOTOR CO LTD

KIA CORP

Germany

China

Japan

Germany

Israel

621

455

164

124

100

Crosswalk

How Hydropower is matched to the patent classifications. The entries below were chosen for it; each stands for itself and everything beneath it in the scheme, 124 Cooperative entries in all. A patent family counts when any of its codes, in either scheme and at any office, falls under one of them. Codes since retired are placed under the entries that replaced them.

Entry	Title in the scheme	Why it is chosen	CPC codes	IPC codes	Documents
F03B	Machines or engines for liquids	Water turbines and hydraulic machines, including pumped storage	115	57	238,185
E02B9/00	Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same	Hydropower plant civil works and layout	8	5	26,498
Y02E10/20	Hydro energy	Tagged hydro energy technologies	1	none	162,494

CPC and IPC codes are the codes in use on patent documents, at any office, that fall under the entry. Documents is the larger of the two schemes' counts of documents carrying one of them. An entry with no IPC codes can be told apart only in the Cooperative scheme.

The Cooperative codes in use that count towards Hydropower: 124 codes on 376,787 documents. The full crosswalk is in the cpc-to-capability.csv download.

Code	Title	Under entry	How placed	Documents
Y02E10/20	Hydro energy	Y02E10/20	In the scheme	162,494
F03B13/00	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates	F03B	In the scheme	12,826
F03B13/264	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy using the horizontal flow of water resulting from tide movement	F03B	In the scheme	8,072
F03B17/061	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially in flow direction	F03B	In the scheme	6,962
F03B17/06	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"	F03B	In the scheme	6,474
F03B11/00	Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator	F03B	In the scheme	6,418
F03B13/10	Submerged units incorporating electric generators or motors	F03B	In the scheme	6,368
F03B13/20	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" wherein both members, i.e. wom and rem are movable relative to the sea bed or shore	F03B	In the scheme	6,294
F03B13/06	Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump	F03B	In the scheme	5,797
F03B13/14	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy	F03B	In the scheme	5,042
F03B15/00	Controlling	F03B	In the scheme	4,738
F03B13/26	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy	F03B	In the scheme	3,913
F03B17/02	Other machines or engines using hydrostatic thrust	F03B	In the scheme	3,655
F03B13/08	Machine or engine aggregates in dams or the like; Conduits therefor, e.g. diffusors	F03B	In the scheme	3,571
F03B13/22	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the flow of water resulting from wave movements to drive a motor or turbine	F03B	In the scheme	3,535
F03B17/063	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having no movement relative to the rotor during its rotation	F03B	In the scheme	3,491
F03B3/121	Blades, their form or construction	F03B	In the scheme	3,394
E02B9/08	Tide or wave power plants	E02B9/00	In the scheme	3,207
F03B13/1815	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for limited rotation with an up-and-down movement	F03B	In the scheme	3,206
E02B9/00	Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same	E02B9/00	In the scheme	3,191
F03B7/00	Water wheels	F03B	In the scheme	3,011
F03B3/12	Blades; Blade-carrying rotors	F03B	In the scheme	2,995
F03B17/005	Installations wherein the liquid circulates in a closed loop ; Alleged perpetua mobilia of this or similar kind	F03B	In the scheme	2,860
F03B17/04	Alleged perpetua mobilia	F03B	In the scheme	2,793
F03B13/18	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore	F03B	In the scheme	2,711
F03B11/02	Casings	F03B	In the scheme	2,510
F03B3/04	Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines	F03B	In the scheme	2,500
F03B13/16	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"	F03B	In the scheme	2,418
F03B13/142	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector which creates an oscillating water column	F03B	In the scheme	2,359
F03B17/062	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction	F03B	In the scheme	2,292
F03B3/00	Machines or engines of reaction type; Parts or details peculiar thereto	F03B	In the scheme	2,291
F03B13/24	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy to produce a flow of air, e.g. to drive an air turbine	F03B	In the scheme	2,226
F03B3/18	Stator blades; Guide conduits or vanes, e.g. adjustable	F03B	In the scheme	2,193
F03B11/008	Measuring or testing arrangements	F03B	In the scheme	2,190
F03B13/12	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy	F03B	In the scheme	2,151
F03B13/187	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem and the wom directly actuates the piston of a pump	F03B	In the scheme	1,928
F03B17/065	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having a cyclic movement relative to the rotor during its rotation	F03B	In the scheme	1,893
F03B13/1845	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem	F03B	In the scheme	1,870
F03B17/00	Other machines or engines	F03B	In the scheme	1,869
F03B13/1885	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is tied to the rem	F03B	In the scheme	1,864
F03B3/183	Adjustable vanes, e.g. wicket gates	F03B	In the scheme	1,848
F03B1/00	Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on blades or like rotors, e.g. Pelton wheels; Parts or details peculiar thereto	F03B	In the scheme	1,847
F03B3/02	Machines or engines of reaction type; Parts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines	F03B	In the scheme	1,817
E02B9/06	Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates	E02B9/00	In the scheme	1,703
F03B11/06	Bearing arrangements	F03B	In the scheme	1,675
F03B11/08	Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for removing foreign matter, e.g. mud	F03B	In the scheme	1,644
F03B11/006	Sealing arrangements	F03B	In the scheme	1,629
F03B13/182	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for limited rotation with a to-and-fro movement	F03B	In the scheme	1,628
F03B17/025	Other machines or engines using hydrostatic thrust and reciprocating motion	F03B	In the scheme	1,567
F03B11/004	Valve arrangements	F03B	In the scheme	1,491
F03B1/02	Buckets; Bucket-carrying rotors	F03B	In the scheme	1,356
F03B1/04	Nozzles; Nozzle-carrying members	F03B	In the scheme	1,339
F03B3/145	Mechanisms for adjusting the blades	F03B	In the scheme	1,309
F03B15/06	Regulating, i.e. acting automatically	F03B	In the scheme	1,308
F03B11/04	Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing	F03B	In the scheme	1,282
F03B11/002	Injecting air or other fluid	F03B	In the scheme	1,270
F03B13/262	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy using the relative movement between a tide-operated member and another member	F03B	In the scheme	1,247
F03B3/126	Rotors for essentially axial flow, e.g. for propeller turbines	F03B	In the scheme	1,210
F03B3/14	Rotors having adjustable blades	F03B	In the scheme	1,194
F03B13/105	Bulb groups	F03B	In the scheme	1,192
F03B13/02	Adaptations for drilling wells	F03B	In the scheme	1,168
F03B3/125	Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines	F03B	In the scheme	1,167
E02B9/04	Free-flow canals or flumes; Intakes	E02B9/00	In the scheme	1,150
E02B9/02	Water-ways	E02B9/00	In the scheme	1,093
F03B7/003	Water wheels with buckets receiving the liquid	F03B	In the scheme	1,092
F03B13/186	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem where the connection between wom and conversion system takes tension and compression the connection being of the rack-and-pinion type	F03B	In the scheme	1,063
F03B15/04	Controlling by varying liquid flow of turbines	F03B	In the scheme	1,055
F03B13/188	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is flexible or deformable	F03B	In the scheme	1,048
F03B15/08	Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow	F03B	In the scheme	941
F03B13/083	The generator rotor being mounted as turbine rotor rim	F03B	In the scheme	925
F03B13/148	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the static pressure increase due to the wave	F03B	In the scheme	913
F03B15/02	Controlling by varying liquid flow	F03B	In the scheme	891
F03B13/1855	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem where the connection between wom and conversion system takes tension and compression	F03B	In the scheme	884
F03B15/18	Regulating, i.e. acting automatically for safety purposes, e.g. preventing overspeed	F03B	In the scheme	850
F03B15/20	Controlling by varying liquid flow specially adapted for turbines with jets of high-velocity liquid impinging on bladed or like rotors	F03B	In the scheme	844
F03B13/183	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of a turbine-like wom	F03B	In the scheme	836
F03B13/189	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is tied to the rem acting directly on the piston of a pump	F03B	In the scheme	836
F03B13/145	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector which lifts water above sea level for immediate use in an energy converter	F03B	In the scheme	834
F03B3/06	Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines with adjustable blades, e.g. Kaplan turbines	F03B	In the scheme	821
F03B13/268	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy making use of a dam	F03B	In the scheme	774
F03B17/067	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having a cyclic movement relative to the rotor during its rotation the cyclic relative movement being positively coupled to the movement of rotation	F03B	In the scheme	774
F03B3/128	Mounting, demounting	F03B	In the scheme	774
F03B13/1865	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem where the connection between wom and conversion system takes tension only	F03B	In the scheme	772
F03B3/103	Machines or engines of reaction type; Parts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines the same wheel acting as turbine wheel and as pump wheel	F03B	In the scheme	772
F03B17/066	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having a cyclic movement relative to the rotor during its rotation and a rotor of the endless-chain type	F03B	In the scheme	751
F03B13/1875	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem and the wom is the piston or the cylinder in a pump	F03B	In the scheme	721
F03B15/005	Starting, also of pump-turbines	F03B	In the scheme	719
F03B3/186	Spiral or volute casings	F03B	In the scheme	716
F03B5/00	Machines or engines characterised by non-bladed rotors, e.g. serrated, using friction	F03B	In the scheme	688
F03B3/10	Machines or engines of reaction type; Parts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines	F03B	In the scheme	682
F03B15/14	Regulating, i.e. acting automatically by or of water level	F03B	In the scheme	653
F03B3/16	Stators	F03B	In the scheme	604
F03B15/16	Regulating, i.e. acting automatically by power output	F03B	In the scheme	585
F03B7/006	Water wheels of the endless-chain type	F03B	In the scheme	554
F03B17/064	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having no movement relative to the rotor during its rotation and a rotor of the endless-chain type	F03B	In the scheme	548
F03B13/266	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy to compress air	F03B	In the scheme	538
F03B3/123	Blades, their form or construction specially designed as adjustable blades, e.g. for Kaplan-type turbines	F03B	In the scheme	519
F03B13/181	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for limited rotation	F03B	In the scheme	492
F03B3/08	Machines or engines of reaction type; Parts or details peculiar thereto with pressure-velocity transformation exclusively in rotors	F03B	In the scheme	410
F03B11/066	Arrangements for balancing axial thrust in vertical axis machines	F03B	In the scheme	398
F03B13/086	Plants characterised by the use of siphons; their regulation	F03B	In the scheme	388
F03B13/141	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector	F03B	In the scheme	383
F03B13/185	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem not vertically	F03B	In the scheme	374
F03B9/00	Endless-chain machines or engines	F03B	In the scheme	371
F03B15/12	Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow with retroactive action	F03B	In the scheme	346
E02B9/022	Closures	E02B9/00	In the scheme	319
F03B13/1895	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is tied to the rem where the tie is a tension/compression member	F03B	In the scheme	317
F03B3/106	Machines or engines of reaction type; Parts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines the turbine wheel and the pumps wheel being mounted in adjacent positions on the same shaft in a single casing	F03B	In the scheme	316
F03B13/184	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of a water-wheel type wom	F03B	In the scheme	312
F03B13/144	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector which lifts water above sea level	F03B	In the scheme	297
F03B13/1805	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem	F03B	In the scheme	289
F03B13/1825	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation	F03B	In the scheme	286
F03B13/147	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector which lifts water above sea level for later use	F03B	In the scheme	262
F03B11/025	Covers	F03B	In the scheme	227
F03B11/063	Arrangements for balancing axial thrust	F03B	In the scheme	227
F03B17/068	Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having a cyclic movement relative to the rotor during its rotation the cyclic relative movement being positively coupled to the movement of rotation and a rotor of the endless-chain type	F03B	In the scheme	188
F03B13/04	Adaptations for use in dentistry for driving tools or the like having relatively small outer diameter, e.g. pipe cleaning tools	F03B	In the scheme	170
F03B15/10	Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow without retroactive action	F03B	In the scheme	165
E02B9/025	Closures automatically movable	E02B9/00	In the scheme	164
F03B9/005	Endless-chain machines or engines with buckets receiving the liquid	F03B	In the scheme	147
F03B13/1835	Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of an endless-belt type wom	F03B	In the scheme	121
E02B9/027	Sliding closures	E02B9/00	In the scheme	80
F03B15/22	Controlling by varying liquid flow specially adapted for turbines with jets of high-velocity liquid impinging on bladed or like rotors for safety purposes	F03B	In the scheme	54
F03B15/05	Retired code	F03B	Retired, by main group	1

Match: Direct

The capability is itself a technology or a kind of physical system, and the classification names it. F03B also contains wave and tidal devices (F03B13/12 onward), kept here as power from water. The crosswalk is a first pass that nobody has reviewed.

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