- All sections
- H - Electricity
- H01M - Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy
- H01M 8/04291 - Arrangements for managing water in solid electrolyte fuel cell systems
Patent holdings for IPC class H01M 8/04291
Total number of patents in this class: 373
10-year publication summary
|
35
|
35
|
40
|
49
|
30
|
21
|
36
|
28
|
30
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Toyota Motor Corporation | 31819 |
40 |
| Robert Bosch GmbH | 42632 |
36 |
| Hyundai Motor Company | 21897 |
34 |
| Audi AG | 7345 |
16 |
| Nissan Motor Co., Ltd. | 12458 |
13 |
| Kia Motors Corporation | 7757 |
12 |
| Honda Motor Co., Ltd. | 25174 |
10 |
| Kia Corporation | 9582 |
10 |
| Intelligent Energy Limited | 407 |
8 |
| Toyota Shatai Kabushiki Kaisha | 439 |
8 |
| cellcentric GmbH & Co. KG | 182 |
7 |
| Panasonic Intellectual Property Management Co., Ltd. | 31221 |
6 |
| FuelCell Energy, Inc. | 330 |
6 |
| Toshiba Corporation | 12320 |
5 |
| Volkswagen AG | 7322 |
5 |
| The Boeing Company | 20042 |
4 |
| Bayerische Motoren Werke Aktiengesellschaft | 14278 |
4 |
| Ceres Intellectual Property Company Limited | 262 |
4 |
| Hydrolite Ltd | 44 |
4 |
| Airbus Operations GmbH | 3332 |
3 |
| Other owners | 138 |