- All sections
- H - Electricity
- H01M - Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy
- H01M 8/04225 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
Patent holdings for IPC class H01M 8/04225
Total number of patents in this class: 428
10-year publication summary
7
|
50
|
52
|
43
|
43
|
37
|
51
|
46
|
65
|
14
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Toyota Motor Corporation | 28582 |
44 |
Robert Bosch GmbH | 40953 |
42 |
Hyundai Motor Company | 19021 |
39 |
Nissan Motor Co., Ltd. | 12249 |
32 |
Honda Motor Co., Ltd. | 24537 |
16 |
Audi AG | 7153 |
16 |
Kia Motors Corporation | 7946 |
12 |
Hydrogenics Corporation | 204 |
12 |
Kia Corporation | 6450 |
11 |
Kyocera Corporation | 12735 |
9 |
Panasonic Intellectual Property Management Co., Ltd. | 27812 |
9 |
AVL List GmbH | 1232 |
8 |
Ford Global Technologies, LLC | 19702 |
7 |
Volkswagen AG | 6966 |
7 |
cellcentric GmbH & Co. KG | 160 |
7 |
Ceres Intellectual Property Company Limited | 250 |
6 |
Intelligent Energy Limited | 464 |
6 |
Bloom Energy Corporation | 590 |
5 |
Safran Power Units | 108 |
5 |
Mitsubishi Power, Ltd. | 1680 |
5 |
Other owners | 130 |