- All sections
- C - Chemistrymetallurgy
- C25B - Electrolytic or electrophoretic processes for the production of compounds or non- metalsapparatus 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: 5424
10-year publication summary
|
226
|
211
|
252
|
311
|
336
|
482
|
686
|
947
|
1079
|
443
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Energy Global GmbH & Co. KG | 2904 |
109 |
| Panasonic Intellectual Property Management Co., Ltd. | 30822 |
64 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10810 |
63 |
| Robert Bosch GmbH | 42392 |
58 |
| Toshiba Corporation | 12264 |
54 |
| Honda Motor Co., Ltd. | 25116 |
53 |
| Ohmium International, Inc. | 123 |
52 |
| King Fahd University of Petroleum and Minerals | 1135 |
51 |
| Topsoe A/S | 872 |
50 |
| Saudi Arabian Oil Company | 12808 |
46 |
| Toyota Motor Corporation | 31311 |
43 |
| de Nora Permelec Ltd | 158 |
39 |
| Industrie de Nora S.p.A. | 276 |
38 |
| Linde GmbH | 1253 |
37 |
| Infinium Technology, LLC | 82 |
35 |
| Siemens AG | 24563 |
33 |
| Verdagy, Inc. | 59 |
33 |
| Hyundai Motor Company | 21451 |
32 |
| Asahi Kasei Kabushiki Kaisha | 2633 |
31 |
| Haldor Topsøe A/S | 662 |
29 |
| Other owners | 4474 |