- All sections
- C - Chemistry; metallurgy
- C25B - Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
- C25B 1/04 - Hydrogen or oxygen by electrolysis of water
Patent holdings for IPC class C25B 1/04
Total number of patents in this class: 4148
10-year publication summary
|
163
|
227
|
210
|
251
|
310
|
332
|
473
|
681
|
881
|
310
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Energy Global GmbH & Co. KG | 2775 |
80 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10525 |
59 |
| Toshiba Corporation | 12017 |
50 |
| Ohmium International, Inc. | 105 |
47 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
44 |
| Honda Motor Co., Ltd. | 24537 |
43 |
| de Nora Permelec Ltd | 152 |
35 |
| Siemens AG | 24990 |
33 |
| Saudi Arabian Oil Company | 11322 |
33 |
| Haldor Topsøe A/S | 698 |
32 |
| Topsoe A/S | 732 |
31 |
| Industrie de Nora S.p.A. | 274 |
29 |
| King Fahd University of Petroleum and Minerals | 779 |
27 |
| Linde GmbH | 1122 |
27 |
| Asahi Kasei Kabushiki Kaisha | 2429 |
26 |
| Infinium Technology, LLC | 58 |
25 |
| The Regents of the University of California | 18943 |
23 |
| Toyota Motor Corporation | 28582 |
23 |
| Hyundai Motor Company | 19021 |
23 |
| National University Corporation Yokohama National University | 328 |
21 |
| Other owners | 3437 |