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Corporate Rankings ranking par secteur: Production et distribution d'électricité, de gaz et d'eau
Corporate Rankings ranking par secteur: Production et distribution d'électricité, de gaz et d'eau
Classements des inventions du secteur: Production et distribution d'électricité, de gaz et d'eau
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| Rank | Group | Number of Patents | Continent | Country |
| 1 | OSAKA GAS COMPANY LTD | 6294 | Asia | Japan |
| 2 | TOKYO GAS CO LTD | 4335 | Asia | Japan |
| 3 | TOKYO ELECTRIC POWER COMPANY | 2235 | Asia | Japan |
| 4 | KANSAI ELECTRIC POWER CO INC (THE) | 2097 | Asia | Japan |
| 5 | CHUGOKU ELECTRIC POWER CO INC | 1867 | Asia | Japan |
| 6 | KOREA ELECTRIC POWER CORPORATION | 1448 | Asia | South korea |
| 7 | CHUBU ELECTRIC POWER COMPANY INCORPORATED | 1331 | Asia | Japan |
| 8 | KYUSHU ELECTRIC POWER COMPANY INCORPORATED | 508 | Asia | Japan |
| 9 | TOHOKU ELECTRIC POWER CO INC | 423 | Asia | Japan |
| 10 | NALCO HOLDING COMPANY | 324 | America | United states |
| 11 | VEOLIA ENVIRONNEMENT | 321 | Europe | France |
| 12 | GDF SUEZ | 297 | Europe | France |
| 13 | ELECTRICITE DE FRANCE SA - EDF | 274 | Europe | France |
| 14 | BRITISH NUCLEAR FUELS LIMITED | 221 | Europe | United kingdom |
| 15 | RWE AG | 179 | Europe | Germany |
| 16 | FORTUM OYJ | 153 | Europe | Finland |
| 17 | HYDRO-QUEBEC | 140 | America | Canada |
| 18 | E.ON AG | 94 | Europe | Germany |
| 19 | CENTRICA PLC | 90 | Europe | United kingdom |
| 20 | VATTENFALL AB | 66 | Europe | Sweden |
| 21 | NATIONAL GRID PLC | 61 | Europe | United kingdom |
| 22 | ENEL SPA | 56 | Europe | Italy |
| 23 | SOCIETE DES PARTICIPATIONS DU COMMISSARIAT A L'ENERGIE ATOMIQUE - AREVA | 47 | Europe | France |
| 24 | ENERGIE BADEN-WURTTEMBERG AG | 44 | Europe | Germany |
| 25 | INTERNATIONAL POWER PLC | 41 | Europe | United kingdom |