GINC Patents
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Strategic Infrastructure

Transmission & Distribution

Transmission and distribution carry high-voltage electricity from generation plants over long distances and deliver it at usable voltages to consumers, through lines, substations, transformers and cross-border interconnectors. One of the capabilities of Energy Infrastructure.

International families
30k2015 to 2024
Leading country
Japan1.3× the next
All families
220khome 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

Japan

United States

Germany

China

Switzerland

France

South Korea

United Kingdom

Taiwan

Italy

6,370

4,752

4,565

3,876

2,155

1,710

1,652

702

511

503

2000 to 2025
1Japan6,37020.9%0.8×
16,678
2United States4,75215.6%0.8×
8,382
3Germany4,56515.0%0.8×
6,667
4China3,87612.7%1.9×
157,294
5Switzerland2,1557.1%1.0×
2,379
6France1,7105.6%1.1×
2,334
7South Korea1,6525.4%1.0×
17,188
8United Kingdom7022.3%1.0×
1,056
9Taiwan5111.7%0.9×
884
10Italy5031.7%0.9×
704
11Ireland4321.4%1.1×
538
12Sweden3321.1%1.5×
387
13Canada3051.0%0.9×
436
14Austria2981.0%1.3×
354
15Spain2620.9%0.7×
328
16Netherlands2110.7%1.4×
284
17Australia2090.7%0.9×
358
18Denmark1860.6%1.0×
203
19Finland1300.4%0.8×
154
20Belgium1240.4%0.6×
163
21Norway1190.4%1.2×
151
22Türkiye1130.4%1.6×
267
23Brazil860.3%1.0×
313
24Israel830.3%1.4×
115
25India790.3%2.4×
111
26Liechtenstein740.2%0.5×
76
27Russia570.2%0.8×
809
28Singapore510.2%0.8×
68
29Hungary450.1%2.2×
60
30South Africa330.1%0.4×
35
31Poland320.1%0.7×
251
32New Zealand310.1%0.8×
49
33Czechia280.1%1.3×
43
34Cayman Islands150.0%0.4×
16
35Portugal150.0%0.7×
21
36Luxembourg140.0%0.8×
21
37Saudi Arabia140.0%2.5×
28
38Mexico120.0%0.7×
47
39Malaysia120.0%1.0×
22
40Hong Kong100.0%1.0×
27

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 Transmission & Distribution. Names are as held in the source and are not consolidated across subsidiaries.

Global

30,469 international families

SUMITOMO WIRING SYSTEMS · Japan

YAZAKI CORP · Japan

ABB SCHWEIZ AG · Switzerland

SIEMENS AG · Germany

SUMITOMO ELECTRIC INDUSTRIES · Japan

AUTONETWORKS TECHNOLOGIES LTD · Japan

1,571

1,088

1,072

985

914

783

Japan

6,370 international families

SUMITOMO WIRING SYSTEMS

YAZAKI CORP

SUMITOMO ELECTRIC INDUSTRIES

AUTONETWORKS TECHNOLOGIES LTD

AUTO NETWORK GIJUTSU KENKYUSHO KK

MITSUBISHI ELECTRIC CORP

1,569

1,088

914

783

680

620

United States

4,752 international families

HUBBELL INC

COMMSCOPE TECHNOLOGIES LLC

FORD GLOBAL TECH LLC

GEN ELECTRIC

HAMILTON SUNDSTRAND CORP

BOEING CO

245

152

115

112

101

87

Germany

4,565 international families

SIEMENS AG

SIEMENS ENERGY GLOBAL GMBH & CO KG

BOSCH GMBH ROBERT

IGUS GMBH

REINHAUSEN MASCHF SCHEUBECK

DRAEXLMAIER LISA GMBH

978

418

140

117

103

85

China

3,876 international families

STATE GRID CORP CHINA

NR ELECTRIC CO LTD

NR ENGINEERING CO LTD

NARI RELAYS ELECTRIC CO LTD

HUAWEI DIGITAL POWER TECH CO LTD

HUAWEI TECH CO LTD

183

113

113

103

102

93

Switzerland

2,155 international families

ABB SCHWEIZ AG

HITACHI ENERGY LTD

HITACHI ENERGY SWITZERLAND AG

ABB POWER GRIDS SWITZERLAND AG

GENERAL ELECTRIC TECHNOLOGY GMBH

HITACHI ENERGY CORP

989

384

308

262

249

108

Similar capabilities

The nine capabilities that share the most international patent families with Transmission & Distribution, 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

System Control & Dispatch

3.9% shared · 2,043 families in both

China

Japan

United States

Germany

South Korea

5,396

4,879

4,394

2,294

1,663

Strategic Infrastructure

Subsea Cables & International Gateways

1.7% shared · 534 families in both

United States

China

United Kingdom

France

Japan

335

189

129

117

83

Strategic Infrastructure

Storage & Fuel Supply

1.6% shared · 1,305 families in both

Japan

United States

Germany

China

South Korea

10,180

8,639

7,064

6,169

4,954

Critical Technology

Advanced Optical Communication & Photonics

1.2% shared · 949 families in both

Japan

United States

China

Germany

South Korea

13,338

11,398

9,204

2,973

2,316

Production & Innovation

Manufacturing & Advanced Industry

1.2% shared · 6,261 families in both

Japan

United States

Germany

China

South Korea

138,612

87,628

76,621

49,292

40,578

Strategic Infrastructure

Renewable Generation

1.1% shared · 814 families in both

China

Japan

United States

South Korea

Germany

9,914

5,849

5,618

5,116

4,625

Strategic Infrastructure

Data Centres, Compute & Cloud

1.1% shared · 1,037 families in both

United States

China

Japan

South Korea

Germany

23,300

14,719

7,822

4,889

3,301

Strategic Infrastructure

Core & Backbone Networks

1.0% shared · 1,258 families in both

United States

China

Japan

South Korea

Germany

26,336

26,166

15,255

6,683

4,804

Strategic Infrastructure

Rail Infrastructure

0.8% shared · 372 families in both

Germany

Japan

China

United States

France

3,537

3,044

3,029

2,174

1,439

Crosswalk

How Transmission & Distribution is matched to the patent classifications. The entries below were chosen for it; each stands for itself and everything beneath it in the scheme, 633 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.

EntryTitle in the schemeWhy it is chosenCPC codesIPC codesDocuments
H02GInstallation of electric cables or lines, or of combined optical and electric cables or linesInstallation of power cables and overhead lines2311001,013,188
H02BBoards, substations or switching arrangements for the supply or distribution of electric powerSubstations, switchgear and distribution boards10376897,817
H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing meansHigh-voltage circuit breakers and switches17376209,848
H01B9/00Power cablesPower cables35456,399
H01B17/00Insulators or insulating bodies characterised by their formLine and station insulators4635110,291
H01F27/06Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal typeMounting and supporting of power transformers and reactors2139,427
H01F27/08Cooling; VentilatingCooling of transformers11889,776
H01F29/00Variable transformers or inductances not covered by group H01F21/00Variable transformers and tap changers12830,501
H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occuredSectionalised protection of cable and line systems10338,197
H02J3/36Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC linksHigh-voltage direct-current links between networks2124,500
G01R31/08Locating faults in cables, transmission lines, or networksLocating faults in cables and transmission lines8476,831
Y02E60/60Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]Tagged high-voltage direct-current transmission1none24,944

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 Transmission & Distribution: 634 codes on 1,454,545 documents. The 150 most used are listed; the full list is in the cpc-to-capability.csv download.

CodeTitleUnder entryHow placedDocuments
H02B1/28Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproofH02BIn the scheme27,710
H02B1/565Cooling; Ventilation for cabinetsH02BIn the scheme25,466
Y02E60/60Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]Y02E60/60In the scheme24,944
H02G1/02Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cablesH02GIn the scheme23,997
H02J3/36Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC linksH02J3/36In the scheme22,180
H02B1/30Cabinet-type casings; Parts thereof or accessories thereforH02BIn the scheme20,115
H02G3/22Installations of cables or lines through walls, floors or ceilings, e.g. into buildingsH02GIn the scheme19,249
G01R31/088Aspects of digital computingG01R31/08In the scheme16,628
H02G3/32Installations of cables or lines on walls, floors or ceilings using mounting clampsH02GIn the scheme15,647
G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductorsG01R31/08In the scheme15,594
H02G11/02Arrangements of electric cables or lines between relatively-movable parts using take-up reel or drumH02GIn the scheme15,300
H01F27/06Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal typeH01F27/06In the scheme13,931
H02G3/14Fastening of cover or lid to boxH02GIn the scheme13,765
H02G15/013Sealing means for cable inletsH02GIn the scheme13,316
H02B1/46Boxes; Parts thereof or accessories thereforH02BIn the scheme12,900
H02B1/32Mounting of devices thereinH02BIn the scheme11,319
H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occuredH02H7/26In the scheme11,167
G01R31/085Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overheadG01R31/08In the scheme11,058
H02B3/00Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgearH02BIn the scheme10,983
H02G3/0406Details thereofH02GIn the scheme10,539
H02G3/088Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inletsH02GIn the scheme10,471
H02G11/00Arrangements of electric cables or lines between relatively-movable partsH02GIn the scheme10,447
H02G1/06Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicleH02GIn the scheme9,727
G01R31/08Locating faults in cables, transmission lines, or networksG01R31/08In the scheme9,660
H02B1/20Bus-bar or other wiring layouts, e.g. in cubicles, in switchyardsH02BIn the scheme9,625
H02G3/16Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the boxH02GIn the scheme9,603
H02G3/081Bases, casings or coversH02GIn the scheme9,475
H02G1/14Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cablesH02GIn the scheme9,421
H01H33/666Operating arrangementsH01H33/00In the scheme9,270
H02G3/0481Tubings, i.e. having a closed section with a circular cross-sectionH02GIn the scheme8,789
H02G3/30Installations of cables or lines on walls, floors or ceilingsH02GIn the scheme8,657
H02G3/0456Ladders or other supportsH02GIn the scheme8,235
H02G1/04Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretchingH02GIn the scheme8,230
H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or linesH02GIn the scheme8,039
H01F27/14Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or fillingH01F27/08In the scheme7,912
H01F27/085Cooling by ambient airH01F27/08In the scheme7,869
H02G9/06Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits thereforH02GIn the scheme7,852
H02G11/006Arrangements of electric cables or lines between relatively-movable parts using extensible carrier for the cable, e.g. self-coiling springH02GIn the scheme7,781
H02G3/04Protective tubing or conduits, e.g. cable ladders or cable troughsH02GIn the scheme7,599
H01F27/22Cooling by heat conduction through solid or powdered fillingsH01F27/08In the scheme7,464
H02G3/0437ChannelsH02GIn the scheme7,452
H02B1/24Circuit arrangements for boards or switchyardsH02BIn the scheme7,312
H02B1/56Cooling; VentilationH02BIn the scheme7,106
H02G3/0418Covers or lids; Their fasteningsH02GIn the scheme7,093
G01R31/083Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. undergroundG01R31/08In the scheme7,081
H02G1/08Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pullingH02GIn the scheme6,883
H02G15/18Cable junctions protected by sleeves, e.g. for communication cableH02GIn the scheme6,773
H02B1/306Accessories, e.g. windowsH02BIn the scheme6,429
H02B13/035Gas-insulated switchgearH02BIn the scheme6,422
H01F27/08Cooling; VentilatingH01F27/08In the scheme6,376
H02B1/48Mounting of devices thereinH02BIn the scheme6,328
H02G3/18Distribution boxes; Connection or junction boxes providing line outletsH02GIn the scheme6,257
H02G3/083InletsH02GIn the scheme6,244
H02H7/268Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for DC systemsH02H7/26In the scheme6,241
H02B1/54Anti-seismic devices or installationsH02BIn the scheme6,163
H02G3/02DetailsH02GIn the scheme6,135
H02G7/00Overhead installations of electric lines or cablesH02GIn the scheme6,072
H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradientsH01B9/00In the scheme5,956
H02G3/08Distribution boxes; Connection or junction boxesH02GIn the scheme5,953
H01H33/66Vacuum switchesH01H33/00In the scheme5,891
H02B1/04Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casingH02BIn the scheme5,854
H02G7/20Spatial arrangements or dispositions of lines or cables on poles, posts or towersH02GIn the scheme5,807
H02B13/025Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defectH02BIn the scheme5,796
H02G3/0608Joints for connecting non cylindrical conduits, e.g. channelsH02GIn the scheme5,772
H01F27/12Oil coolingH01F27/08In the scheme5,767
H02G15/10Cable junctions protected by boxes, e.g. by distribution, connection or junction boxesH02GIn the scheme5,734
H02B1/202Cable lay-outsH02BIn the scheme5,665
H02B1/38Hinged covers or doorsH02BIn the scheme5,630
H02G7/05Suspension arrangements or devices for electric cables or linesH02GIn the scheme5,575
H02B1/052Mounting on railsH02BIn the scheme5,516
H01F29/04Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load currentH01F29/00In the scheme5,508
H02G3/06Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the jointH02GIn the scheme5,340
H01H33/42Driving mechanismsH01H33/00In the scheme5,258
H02G9/02Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tileH02GIn the scheme5,251
H01H33/664Contacts; Arc-extinguishing means, e.g. arcing ringsH01H33/00In the scheme5,133
H02G3/0468CorrugatedH02GIn the scheme5,104
H02G7/16Devices for removing snow or ice from lines or cablesH02GIn the scheme5,027
H02G1/10Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle in or under waterH02GIn the scheme4,998
H02G15/007Devices for relieving mechanical stressH02GIn the scheme4,954
H02G3/086Assembled boxesH02GIn the scheme4,796
H02G3/12Distribution boxes; Connection or junction boxes for flush mountingH02GIn the scheme4,748
H02B1/36Racks with withdrawable unitsH02BIn the scheme4,732
H02G5/06Totally-enclosed installations, e.g. in metal casingsH02GIn the scheme4,694
H02G13/00Installations of lightning conductors; Fastening thereof to supporting structureH02GIn the scheme4,648
H02G3/0412Heat or fire protective meansH02GIn the scheme4,601
G01R31/11Locating faults in cables, transmission lines, or networks using pulse reflection methodsG01R31/08In the scheme4,565
H02G9/10Installations of electric cables or lines in or on the ground or water in cable chambers, e.g. in manhole or in handholeH02GIn the scheme4,552
H02G3/0487Tubings, i.e. having a closed section with a non-circular cross-sectionH02GIn the scheme4,549
H01B9/00Power cablesH01B9/00In the scheme4,526
H02G3/00Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehiclesH02GIn the scheme4,477
H02G3/121Distribution boxes; Connection or junction boxes for flush mounting in plain wallsH02GIn the scheme4,451
H01H33/596Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle for interrupting DCH01H33/00In the scheme4,401
H02H7/262Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking ordersH02H7/26In the scheme4,352
H01H33/66207Specific housing details, e.g. sealing, soldering or brazingH01H33/00In the scheme4,340
H02B1/50Pedestal- or pad-mounted casings; Parts thereof or accessories thereforH02BIn the scheme4,216
H02G3/263Installation, e.g. suspension, of conduit channels or other supportsH02GIn the scheme4,209
H02B7/06Distribution substations, e.g. for urban networkH02BIn the scheme4,163
H02G15/08Cable junctionsH02GIn the scheme4,093
H02G3/185Floor outlets and access cupsH02GIn the scheme4,091
H02B1/26Casings; Parts thereof or accessories thereforH02BIn the scheme4,089
H02G13/80Discharge by conduction or dissipation, e.g. rods, arresters, spark gapsH02GIn the scheme4,068
H02G3/0462Tubings, i.e. having a closed sectionH02GIn the scheme4,035
H02G7/02Devices for adjusting or maintaining mechanical tension, e.g. take-up deviceH02GIn the scheme3,960
H01B9/006Constructional features relating to the conductorsH01B9/00In the scheme3,956
H02G15/113Boxes split longitudinally in main cable directionH02GIn the scheme3,906
H02G3/123Distribution boxes; Connection or junction boxes for flush mounting in thin wallsH02GIn the scheme3,822
H02B1/21Bus-bar arrangements for rack-mounted devices with withdrawable unitsH02BIn the scheme3,804
H01H33/91Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gasH01H33/00In the scheme3,693
H02G15/04Cable-end sealingsH02GIn the scheme3,692
H02H7/261Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stationsH02H7/26In the scheme3,685
H02G3/045Channels provided with perforations or slots permitting introduction or exit of wiresH02GIn the scheme3,656
H01F29/02Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windingsH01F29/00In the scheme3,634
H01B17/38Fittings, e.g. caps; Fastenings thereforH01B17/00In the scheme3,616
H02G15/06Cable terminating boxes, frames or other structuresH02GIn the scheme3,570
H02B11/133Withdrawal mechanism with interlockH02BIn the scheme3,547
H02B13/045Details of casing, e.g. gas tightnessH02BIn the scheme3,537
H02G3/26Installations of cables, lines, or separate protective tubing therefor directly on or in walls, ceilings, or floorsH02GIn the scheme3,514
H02G7/053Suspension clamps and clips for electric overhead lines not suspended to a supporting wireH02GIn the scheme3,473
H02G3/10Distribution boxes; Connection or junction boxes for surface mounting on a wallH02GIn the scheme3,437
H02G7/14Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of soundH02GIn the scheme3,371
H02B1/056Mounting on plugboardsH02BIn the scheme3,343
H02B1/52Mobile units, e.g. for work sitesH02BIn the scheme3,338
H01H33/6661Combination with other type of switch, e.g. for load break switchesH01H33/00In the scheme3,313
H02G3/0475Tubings, i.e. having a closed section formed by a succession of articulated unitsH02GIn the scheme3,309
H02G3/0616Joints for connecting tubing to casingH02GIn the scheme3,289
H01B9/027Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of semi-conducting layersH01B9/00In the scheme3,264
H02G5/10CoolingH02GIn the scheme3,253
H01B9/005Power cables including optical transmission elementsH01B9/00In the scheme3,198
H02G13/40Connection to earthH02GIn the scheme3,168
H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangementsH02BIn the scheme3,137
H01F27/10Liquid coolingH01F27/08In the scheme3,128
H02G3/03CoolingH02GIn the scheme3,084
H01H33/56Gas reservoirsH01H33/00In the scheme3,080
H02H7/263Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured valuesH02H7/26In the scheme3,054
H01H33/022Details particular to three-phase circuit breakersH01H33/00In the scheme3,005
H02G3/20Ceiling roses or other lighting setsH02GIn the scheme3,000
H02G15/1806Heat shrinkable sleevesH02GIn the scheme2,926
H02B1/303Bases or feetH02BIn the scheme2,846
H01B17/56Insulating bodiesH01B17/00In the scheme2,835
H02G1/005Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for cutting cables or wires, or splicingH02GIn the scheme2,830
H02B13/02Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casingH02BIn the scheme2,776
H01F27/16Water coolingH01F27/08In the scheme2,760
H01H33/02DetailsH01H33/00In the scheme2,742
H02G1/081Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling using pulling means at cable ends, e.g. pulling eyes or anchorsH02GIn the scheme2,733
H01B17/58Tubes, sleeves, beads, or bobbins through which the conductor passesH01B17/00In the scheme2,730
H02B13/065Means for detecting or reacting to mechanical or electrical defectsH02BIn the scheme2,721
H01B17/26Lead-in insulators; Lead-through insulatorsH01B17/00In the scheme2,705
H02G7/056Dead-end clampsH02GIn the scheme2,667
H02B11/04Isolating-contacts, e.g. mountings or shieldingsH02BIn the scheme2,666
H01F29/143Retired codeH01F29/00Retired, by main group2,635
Match: Direct
The capability is itself a technology or a kind of physical system, and the classification names it. Transformers have no clean entry; three subgroups of H01F27/00 and H01F29/00 are used to avoid small electronic inductors. H02G and H02B include building-level wiring. The crosswalk is a first pass that nobody has reviewed.

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