← Capabilities
- International families
- 28k2015 to 2024
- Leading country
- United States1.0× the next
- All families
- 336khome 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
United States
China
Japan
South Korea
Germany
France
Canada
United Kingdom
Netherlands
Italy
5,326
5,281
4,432
2,243
2,077
920
727
677
500
475
| 2000 to 2025 | ||||||
|---|---|---|---|---|---|---|
| 1 | United States | 5,326 | 18.8% | 0.9× | 9,617 | |
| 2 | China | 5,281 | 18.6% | 1.5× | 268,596 | |
| 3 | Japan | 4,432 | 15.6% | 0.8× | 16,575 | |
| 4 | South Korea | 2,243 | 7.9% | 0.9× | 20,656 | |
| 5 | Germany | 2,077 | 7.3% | 0.9× | 3,073 | |
| 6 | France | 920 | 3.2% | 1.0× | 1,330 | |
| 7 | Canada | 727 | 2.6% | 0.7× | 1,055 | |
| 8 | United Kingdom | 677 | 2.4% | 0.8× | 951 | |
| 9 | Netherlands | 500 | 1.8% | 0.7× | 659 | |
| 10 | Italy | 475 | 1.7% | 1.1× | 866 | |
| 11 | Taiwan | 423 | 1.5% | 0.8× | 1,528 | |
| 12 | Australia | 385 | 1.4% | 1.0× | 609 | |
| 13 | Finland | 381 | 1.3% | 0.7× | 451 | |
| 14 | Switzerland | 371 | 1.3% | 0.9× | 455 | |
| 15 | Sweden | 343 | 1.2% | 0.9× | 404 | |
| 16 | Spain | 337 | 1.2% | 1.1× | 510 | |
| 17 | Israel | 323 | 1.1% | 0.9× | 376 | |
| 18 | India | 280 | 1.0% | 1.1× | 365 | |
| 19 | Denmark | 240 | 0.8% | 1.1× | 265 | |
| 20 | Austria | 220 | 0.8% | 1.0× | 276 | |
| 21 | Saudi Arabia | 210 | 0.7% | 1.1× | 534 | |
| 22 | Norway | 207 | 0.7% | 0.8× | 246 | |
| 23 | Türkiye | 186 | 0.7% | 1.9× | 358 | |
| 24 | Belgium | 169 | 0.6% | 1.0× | 249 | |
| 25 | Singapore | 167 | 0.6% | 0.9× | 191 | |
| 26 | Russia | 131 | 0.5% | 0.8× | 1,535 | |
| 27 | Brazil | 131 | 0.5% | 0.9× | 700 | |
| 28 | Poland | 83 | 0.3% | 0.8× | 755 | |
| 29 | Mexico | 69 | 0.2% | 0.9× | 365 | |
| 30 | South Africa | 59 | 0.2% | 0.5× | 68 | |
| 31 | New Zealand | 54 | 0.2% | 1.1× | 91 | |
| 32 | Ireland | 53 | 0.2% | 1.3× | 68 | |
| 33 | Czechia | 48 | 0.2% | 1.1× | 135 | |
| 34 | Portugal | 47 | 0.2% | 2.1× | 83 | |
| 35 | Malaysia | 46 | 0.2% | 1.0× | 170 | |
| 36 | Hong Kong | 44 | 0.2% | 0.8× | 69 | |
| 37 | Luxembourg | 40 | 0.1% | 0.2× | 46 | |
| 38 | Hungary | 20 | 0.1% | 1.2× | 65 | |
| 39 | Cayman Islands | 12 | 0.0% | 0.3× | 14 | |
| 40 | Liechtenstein | 10 | 0.0% | 1.0× | 11 |
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 Wastewater & Sanitation. Names are as held in the source and are not consolidated across subsidiaries.
Global
28,343 international families
KURITA WATER IND LTD · Japan
ORGANO CORP · Japan
PANASONIC IP MAN CO LTD · Japan
ORGANO KK · Japan
LG ELECTRONICS INC · South Korea
ECOLAB USA INC · United States
427
264
257
176
173
140
United States
5,326 international families
ECOLAB USA INC
EVOQUA WATER TECH LLC
UNIV CALIFORNIA
BL TECHNOLOGIES INC
MASSACHUSETTS INST TECHNOLOGY
DOW GLOBAL TECHNOLOGIES LLC
139
123
77
60
60
57
China
5,281 international families
MIDEA GROUP CO LTD
NANJING UNIVERSITY OF TECHNOLOGY
UNIV TONGJI
FOSHAN SHUNDE MIDEA WATER DISPENSER MFG CO LTD
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD
HUNAN BRUNP RECYCLING TECH CO LTD
135
127
93
92
64
64
Japan
4,432 international families
KURITA WATER IND LTD
ORGANO CORP
PANASONIC IP MAN CO LTD
ORGANO KK
TORAY INDUSTRIES
PANASONIC IP MAN CORP
427
263
257
175
136
116
South Korea
2,243 international families
LG ELECTRONICS INC
SAMSUNG ELECTRONICS CO LTD
COWAY CO LTD
LG CHEMICAL LTD
DOOSAN HEAVY IND & CONSTRUCTION CO LTD
KOREA INST SCI & TECH
173
116
78
58
50
44
Germany
2,077 international families
ACO AHLMANN SE & CO KG
BASF SE
BOSCH GMBH ROBERT
ACO SEVERIN AHLMANN GMBH & CO KG
BRITA GMBH
BRITA SE
71
61
56
55
51
35
Similar capabilities
The nine capabilities that share the most international patent families with Wastewater & Sanitation, 2015 to 2024: the families counted in both as a share of those counted in either. Each card shows its five largest countries.
Strategic Infrastructure
Water Supply & Treatment
73.2% shared · 22,437 families in both
United States
China
Japan
South Korea
Germany
5,013
4,301
3,866
1,986
1,665
Strategic Infrastructure
Bulk Water Transfer & Desalination
23.7% shared · 6,991 families in both
United States
Japan
China
South Korea
Germany
1,780
1,554
1,245
636
477
Strategic Infrastructure
Processing & Refining
3.5% shared · 1,782 families in both
United States
China
Japan
Germany
France
5,663
3,476
2,794
1,548
1,459
Strategic Infrastructure
Dams, Reservoirs & Flood Defence
3.1% shared · 944 families in both
China
United States
Germany
Japan
South Korea
808
403
293
212
172
Strategic Infrastructure
Chemicals & Hazardous Process Industry
3.0% shared · 3,000 families in both
United States
Japan
China
Germany
South Korea
16,120
13,036
11,408
6,357
5,716
Strategic Infrastructure
Solid Waste & Recycling
2.7% shared · 1,345 families in both
Japan
China
United States
Germany
South Korea
3,883
3,717
3,628
1,951
1,882
Critical Technology
Hydrogen, Ammonia & Sustainable Fuels
2.5% shared · 1,651 families in both
Japan
United States
Germany
South Korea
China
8,805
6,231
5,748
4,176
2,470
Production & Innovation
Foundational & Process Industries
1.9% shared · 6,269 families in both
Japan
United States
China
South Korea
Germany
94,317
55,479
36,011
28,513
26,005
Strategic Infrastructure
Fisheries & Aquaculture
1.5% shared · 483 families in both
China
United States
Japan
Norway
South Korea
887
642
521
475
307
Crosswalk
How Wastewater & Sanitation is matched to the patent classifications. The entries below were chosen for it; each stands for itself and everything beneath it in the scheme, 383 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 |
|---|---|---|---|---|---|
| C02F3/00 | Biological treatment of water, waste water, or sewage | Biological treatment of waste water and sewage | 99 | 19 | 451,335 |
| C02F11/00 | Treatment of sludge; Devices therefor | Treatment of sewage sludge | 32 | 25 | 265,886 |
| C02F1/00 | Treatment of water, waste water, or sewage | Physical and chemical treatment of waste water | 150 | 47 | 1,619,824 |
| C02F9/00 | Multistage treatment of water, waste water or sewage | Multistage treatment of waste water | 3 | 9 | 346,592 |
| E03F | Sewers; cesspools | Sewers, sewer structures and cesspools | 80 | 30 | 347,565 |
| A47K11/00 | Closets without flushing; Urinals without flushing; Chamber pots; Chairs with toilet conveniences or specially adapted for use with toilets | Dry and non-flushing toilets | 13 | 9 | 31,908 |
| Y02W10/00 | Technologies for wastewater treatment | Tagged wastewater treatment technologies | 13 | none | 323,080 |
| E03F5/10 | Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins | Left out |
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 Wastewater & Sanitation: 390 codes on 2,801,912 documents. The 150 most used are listed; the full list is in the cpc-to-capability.csv download.
| Code | Title | Under entry | How placed | Documents |
|---|---|---|---|---|
| Y02W10/10 | Biological treatment of water, waste water, or sewage | Y02W10/00 | In the scheme | 230,605 |
| C02F9/00 | Multistage treatment of water, waste water or sewage | C02F9/00 | In the scheme | 112,421 |
| C02F1/001 | Processes for the treatment of water whereby the filtration technique is of importance | C02F1/00 | In the scheme | 106,625 |
| C02F1/66 | Treatment of water, waste water, or sewage by neutralisation; pH adjustment | C02F1/00 | In the scheme | 58,928 |
| Y02W10/37 | Wastewater or sewage treatment systems using renewable energies using solar energy | Y02W10/00 | In the scheme | 56,620 |
| C02F1/283 | Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them | C02F1/00 | In the scheme | 56,517 |
| C02F1/441 | Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis | C02F1/00 | In the scheme | 48,399 |
| C02F3/34 | Biological treatment of water, waste water, or sewage characterised by the microorganisms used | C02F3/00 | In the scheme | 38,304 |
| C02F1/281 | Treatment of water, waste water, or sewage by sorption using inorganic sorbents | C02F1/00 | In the scheme | 37,587 |
| C02F1/52 | Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities | C02F1/00 | In the scheme | 37,135 |
| C02F1/42 | Treatment of water, waste water, or sewage by ion-exchange | C02F1/00 | In the scheme | 37,046 |
| C02F1/444 | Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration | C02F1/00 | In the scheme | 36,850 |
| C02F1/44 | Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis | C02F1/00 | In the scheme | 36,129 |
| C02F1/32 | Treatment of water, waste water, or sewage by irradiation with ultraviolet light | C02F1/00 | In the scheme | 35,542 |
| C02F2001/007 | Processes including a sedimentation step | C02F1/00 | In the scheme | 35,091 |
| C02F1/78 | Treatment of water, waste water, or sewage by oxidation with ozone | C02F1/00 | In the scheme | 34,748 |
| C02F1/50 | Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment | C02F1/00 | In the scheme | 33,482 |
| C02F1/725 | Treatment of water, waste water, or sewage by oxidation by catalytic oxidation | C02F1/00 | In the scheme | 33,345 |
| C02F1/5236 | Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents | C02F1/00 | In the scheme | 33,251 |
| C02F1/008 | Control or steering systems not provided for elsewhere in subclass C02F | C02F1/00 | In the scheme | 32,440 |
| C02F1/56 | Macromolecular compounds | C02F1/00 | In the scheme | 29,541 |
| C02F1/40 | Devices for separating or removing fatty or oily substances or similar floating material | C02F1/00 | In the scheme | 29,263 |
| C02F1/722 | Oxidation by peroxides | C02F1/00 | In the scheme | 25,680 |
| C02F1/00 | Treatment of water, waste water, or sewage | C02F1/00 | In the scheme | 25,380 |
| C02F1/24 | Treatment of water, waste water, or sewage by flotation | C02F1/00 | In the scheme | 23,878 |
| C02F1/30 | Treatment of water, waste water, or sewage by irradiation | C02F1/00 | In the scheme | 23,672 |
| C02F1/325 | Irradiation devices or lamp constructions | C02F1/00 | In the scheme | 21,230 |
| C02F1/5281 | Installations for water purification using chemical agents | C02F1/00 | In the scheme | 20,847 |
| C02F1/28 | Treatment of water, waste water, or sewage by sorption | C02F1/00 | In the scheme | 20,628 |
| C02F1/04 | Treatment of water, waste water, or sewage by heating by distillation or evaporation | C02F1/00 | In the scheme | 20,618 |
| C02F1/20 | Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases | C02F1/00 | In the scheme | 20,516 |
| C02F1/76 | Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens | C02F1/00 | In the scheme | 20,044 |
| C02F1/285 | Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents | C02F1/00 | In the scheme | 18,408 |
| C02F1/72 | Treatment of water, waste water, or sewage by oxidation | C02F1/00 | In the scheme | 18,134 |
| C02F1/46109 | Electrodes | C02F1/00 | In the scheme | 17,855 |
| C02F1/288 | Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered | C02F1/00 | In the scheme | 17,766 |
| C02F3/30 | Aerobic and anaerobic processes | C02F3/00 | In the scheme | 17,367 |
| C02F1/68 | Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water | C02F1/00 | In the scheme | 17,241 |
| C02F3/28 | Anaerobic digestion processes | C02F3/00 | In the scheme | 16,947 |
| C02F1/4672 | Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation | C02F1/00 | In the scheme | 16,280 |
| C02F1/5245 | Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron | C02F1/00 | In the scheme | 15,661 |
| E03F5/14 | Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates | E03F | In the scheme | 15,485 |
| C02F3/302 | Nitrification and denitrification treatment | C02F3/00 | In the scheme | 15,353 |
| C02F1/02 | Treatment of water, waste water, or sewage by heating | C02F1/00 | In the scheme | 15,271 |
| C02F1/38 | Treatment of water, waste water, or sewage by centrifugal separation | C02F1/00 | In the scheme | 15,054 |
| C02F3/02 | Aerobic processes | C02F3/00 | In the scheme | 14,898 |
| C02F1/442 | Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration | C02F1/00 | In the scheme | 14,861 |
| C02F11/04 | Anaerobic treatment; Production of methane by such processes | C02F11/00 | In the scheme | 14,829 |
| C02F11/12 | Treatment of sludge; Devices therefor by de-watering, drying or thickening | C02F11/00 | In the scheme | 14,343 |
| C02F3/32 | Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae | C02F3/00 | In the scheme | 14,169 |
| C02F1/46104 | Devices therefor; Their operating or servicing | C02F1/00 | In the scheme | 14,009 |
| C02F1/003 | Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices | C02F1/00 | In the scheme | 13,747 |
| C02F1/048 | Purification of waste water by evaporation | C02F1/00 | In the scheme | 13,685 |
| C02F11/13 | Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating | C02F11/00 | In the scheme | 13,078 |
| C02F3/006 | Regulation methods for biological treatment | C02F3/00 | In the scheme | 12,888 |
| C02F11/00 | Treatment of sludge; Devices therefor | C02F11/00 | In the scheme | 12,674 |
| C02F1/004 | Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters | C02F1/00 | In the scheme | 12,276 |
| C02F1/48 | Treatment of water, waste water, or sewage with magnetic or electric fields | C02F1/00 | In the scheme | 12,096 |
| C02F11/121 | Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering | C02F11/00 | In the scheme | 12,086 |
| C02F3/12 | Activated sludge processes | C02F3/00 | In the scheme | 11,703 |
| E03F3/04 | Pipes or fittings specially adapted to sewers | E03F | In the scheme | 11,230 |
| Y02W10/20 | Sludge processing | Y02W10/00 | In the scheme | 11,091 |
| E03F5/06 | Gully gratings | E03F | In the scheme | 10,672 |
| C02F1/4674 | Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine | C02F1/00 | In the scheme | 10,670 |
| C02F2001/46133 | Electrodes characterised by the material | C02F1/00 | In the scheme | 10,474 |
| C02F1/74 | Treatment of water, waste water, or sewage by oxidation with air | C02F1/00 | In the scheme | 10,440 |
| C02F3/00 | Biological treatment of water, waste water, or sewage | C02F3/00 | In the scheme | 10,375 |
| C02F1/286 | Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof | C02F1/00 | In the scheme | 10,340 |
| C02F1/54 | Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material | C02F1/00 | In the scheme | 10,249 |
| Y02W10/40 | Valorisation of by-products of wastewater, sewage or sludge processing | Y02W10/00 | In the scheme | 10,117 |
| C02F1/461 | Treatment of water, waste water, or sewage by electrochemical methods by electrolysis | C02F1/00 | In the scheme | 9,892 |
| C02F1/36 | Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations | C02F1/00 | In the scheme | 9,715 |
| C02F3/10 | Packings; Fillings; Grids | C02F3/00 | In the scheme | 9,710 |
| C02F1/58 | Treatment of water, waste water, or sewage by removing specified dissolved compounds | C02F1/00 | In the scheme | 9,617 |
| C02F1/70 | Treatment of water, waste water, or sewage by reduction | C02F1/00 | In the scheme | 9,567 |
| C02F1/14 | Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy | C02F1/00 | In the scheme | 9,349 |
| C02F1/4693 | Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis | C02F1/00 | In the scheme | 9,271 |
| C02F11/122 | Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses | C02F11/00 | In the scheme | 8,905 |
| C02F9/20 | Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems | C02F9/00 | In the scheme | 8,842 |
| C02F3/06 | Aerobic processes using submerged filters | C02F3/00 | In the scheme | 8,673 |
| C02F1/463 | Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation | C02F1/00 | In the scheme | 8,644 |
| C02F11/02 | Biological treatment | C02F11/00 | In the scheme | 8,175 |
| C02F2001/425 | Treatment of water, waste water, or sewage by ion-exchange using cation exchangers | C02F1/00 | In the scheme | 8,121 |
| C02F3/1268 | Membrane bioreactor systems | C02F3/00 | In the scheme | 8,056 |
| C02F3/20 | Activated sludge processes using diffusers | C02F3/00 | In the scheme | 8,006 |
| C02F1/4618 | Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water | C02F1/00 | In the scheme | 7,970 |
| C02F3/301 | Aerobic and anaerobic treatment in the same reactor | C02F3/00 | In the scheme | 7,690 |
| E03F1/00 | Methods, systems, or installations for draining-off sewage or storm water | E03F | In the scheme | 7,513 |
| E03F5/0407 | Floor drains for indoor use | E03F | In the scheme | 7,341 |
| E03F5/22 | Adaptations of pumping plants for lifting sewage | E03F | In the scheme | 7,203 |
| C02F3/308 | Biological phosphorus removal | C02F3/00 | In the scheme | 7,196 |
| C02F1/26 | Treatment of water, waste water, or sewage by extraction | C02F1/00 | In the scheme | 7,119 |
| C02F1/006 | Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks | C02F1/00 | In the scheme | 6,958 |
| C02F3/2806 | Anaerobic processes using solid supports for microorganisms | C02F3/00 | In the scheme | 6,558 |
| C02F1/469 | Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis | C02F1/00 | In the scheme | 6,470 |
| C02F3/327 | Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants | C02F3/00 | In the scheme | 6,404 |
| C02F11/14 | Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents | C02F11/00 | In the scheme | 6,281 |
| E03F3/06 | Methods of, or installations for, laying sewer pipes | E03F | In the scheme | 6,157 |
| C02F1/688 | Devices in which the water progressively dissolves a solid compound | C02F1/00 | In the scheme | 6,086 |
| C02F11/10 | Treatment of sludge; Devices therefor by pyrolysis | C02F11/00 | In the scheme | 6,086 |
| C02F1/043 | Details | C02F1/00 | In the scheme | 5,909 |
| C02F2001/46142 | Catalytic coating | C02F1/00 | In the scheme | 5,841 |
| C02F1/4695 | Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation | C02F1/00 | In the scheme | 5,813 |
| C02F3/348 | Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed | C02F3/00 | In the scheme | 5,806 |
| Y02W10/30 | Wastewater or sewage treatment systems using renewable energies | Y02W10/00 | In the scheme | 5,765 |
| C02F1/683 | Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water by addition of complex-forming compounds | C02F1/00 | In the scheme | 5,746 |
| C02F3/342 | Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the enzymes used | C02F3/00 | In the scheme | 5,638 |
| C02F3/1273 | Submerged membrane bioreactors | C02F3/00 | In the scheme | 5,626 |
| C02F1/16 | Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes | C02F1/00 | In the scheme | 5,616 |
| C02F1/4691 | Capacitive deionisation | C02F1/00 | In the scheme | 5,616 |
| C02F2001/46152 | Electrodes characterised by the shape or form | C02F1/00 | In the scheme | 5,515 |
| E03F7/00 | Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools | E03F | In the scheme | 5,493 |
| C02F1/62 | Heavy metal compounds | C02F1/00 | In the scheme | 5,386 |
| C02F1/5209 | Regulation methods for flocculation or precipitation | C02F1/00 | In the scheme | 5,364 |
| E03F5/0401 | Gullies for use in roads or pavements | E03F | In the scheme | 5,225 |
| C02F11/147 | Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances | C02F11/00 | In the scheme | 5,190 |
| C02F11/127 | Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation | C02F11/00 | In the scheme | 5,181 |
| C02F1/467 | Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction | C02F1/00 | In the scheme | 5,088 |
| C02F1/505 | Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment by oligodynamic treatment | C02F1/00 | In the scheme | 5,074 |
| C02F1/46 | Treatment of water, waste water, or sewage by electrochemical methods | C02F1/00 | In the scheme | 5,058 |
| C02F1/481 | Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets | C02F1/00 | In the scheme | 5,036 |
| E03F5/0404 | Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor | E03F | In the scheme | 5,016 |
| E03F3/046 | Open sewage channels | E03F | In the scheme | 4,985 |
| C02F1/488 | Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation | C02F1/00 | In the scheme | 4,929 |
| C02F1/5263 | Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds | C02F1/00 | In the scheme | 4,872 |
| C02F2001/422 | Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers | C02F1/00 | In the scheme | 4,859 |
| C02F1/686 | Devices for dosing liquid additives | C02F1/00 | In the scheme | 4,835 |
| C02F1/727 | Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas | C02F1/00 | In the scheme | 4,833 |
| C02F3/1263 | Sequencing batch reactors [SBR] | C02F3/00 | In the scheme | 4,802 |
| C02F11/008 | Sludge treatment by fixation or solidification | C02F11/00 | In the scheme | 4,747 |
| C02F3/1215 | Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates | C02F3/00 | In the scheme | 4,706 |
| C02F11/06 | Treatment of sludge; Devices therefor by oxidation | C02F11/00 | In the scheme | 4,699 |
| C02F1/705 | Reduction by metals | C02F1/00 | In the scheme | 4,661 |
| C02F11/18 | Treatment of sludge; Devices therefor by thermal conditioning | C02F11/00 | In the scheme | 4,657 |
| E03F5/041 | Accessories therefor | E03F | In the scheme | 4,637 |
| C02F2001/46138 | Electrodes comprising a substrate and a coating | C02F1/00 | In the scheme | 4,627 |
| E03F5/02 | Manhole shafts or other inspection chambers; Snow-filling openings; accessories | E03F | In the scheme | 4,598 |
| C02F1/34 | Treatment of water, waste water, or sewage with mechanical oscillations | C02F1/00 | In the scheme | 4,526 |
| C02F1/4608 | Treatment of water, waste water, or sewage by electrochemical methods using electrical discharges | C02F1/00 | In the scheme | 4,490 |
| C02F2001/5218 | Crystallization | C02F1/00 | In the scheme | 4,465 |
| C02F3/04 | Aerobic processes using trickle filters | C02F3/00 | In the scheme | 4,452 |
| Y02W10/33 | Wastewater or sewage treatment systems using renewable energies using wind energy | Y02W10/00 | In the scheme | 4,448 |
| C02F1/445 | Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis | C02F1/00 | In the scheme | 4,357 |
| C02F3/286 | Anaerobic digestion processes including two or more steps | C02F3/00 | In the scheme | 4,340 |
| C02F1/06 | Flash evaporation | C02F1/00 | In the scheme | 4,339 |
| C02F3/005 | Combined electrochemical biological processes | C02F3/00 | In the scheme | 4,338 |
| C02F3/341 | Consortia of bacteria | C02F3/00 | In the scheme | 4,338 |
| E03F5/04 | Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps | E03F | In the scheme | 4,300 |
| E03F1/002 | Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells | E03F | In the scheme | 4,265 |
| E03F1/006 | Pneumatic sewage disposal systems; accessories specially adapted therefore | E03F | In the scheme | 4,260 |
Match: Direct
The capability is itself a technology or a kind of physical system, and the classification names it. Flush toilets and domestic plumbing (E03D, E03C) are left out as household fittings. The crosswalk is a first pass that nobody has reviewed.