- All sections
- H - Electricity
- H01M - Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy
- H01M 8/04228 - 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 shut-down
Patent holdings for IPC class H01M 8/04228
Total number of patents in this class: 300
10-year publication summary
8
|
27
|
54
|
30
|
28
|
23
|
17
|
29
|
39
|
11
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Nissan Motor Co., Ltd. | 12249 |
48 |
Hyundai Motor Company | 19021 |
31 |
Toyota Motor Corporation | 28582 |
30 |
Robert Bosch GmbH | 40953 |
28 |
Kyocera Corporation | 12735 |
12 |
Kia Motors Corporation | 7946 |
12 |
Honda Motor Co., Ltd. | 24537 |
11 |
Kia Corporation | 6450 |
11 |
Panasonic Intellectual Property Management Co., Ltd. | 27812 |
9 |
Audi AG | 7153 |
9 |
Hydrogenics Corporation | 204 |
7 |
cellcentric GmbH & Co. KG | 160 |
7 |
Panasonic Corporation | 20786 |
3 |
GM Global Technology Operations LLC | 13620 |
3 |
Ford Global Technologies, LLC | 19702 |
3 |
Daimler AG | 3462 |
3 |
Bayerische Motoren Werke Aktiengesellschaft | 13126 |
3 |
Aisan Kogyo Kabushiki Kaisha | 722 |
3 |
AVL List GmbH | 1232 |
3 |
Bloom Energy Corporation | 590 |
3 |
Other owners | 61 |