- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 9/04 - Manufacture of electrodes or electrode systems of thermionic cathodes
Patent holdings for IPC class H01J 9/04
Total number of patents in this class: 160
10-year publication summary
|
6
|
9
|
12
|
10
|
9
|
10
|
5
|
10
|
7
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hon Hai Precision Industry Co., Ltd. | 4018 |
15 |
| Tsinghua University | 6026 |
14 |
| Denka Company Limited | 2659 |
13 |
| NuFlare Technology, Inc. | 886 |
7 |
| Koninklijke Philips Electronics N.V. | 8689 |
5 |
| OSRAM GmbH | 2353 |
5 |
| PLANSEE SE | 230 |
5 |
| GE Precision Healthcare LLC | 5567 |
5 |
| General Electric Company | 13827 |
4 |
| Applied Physics Technologies, Inc. | 14 |
4 |
| ASML Netherlands B.V. | 7602 |
3 |
| Beijing University of Technology | 506 |
3 |
| National Institute for Materials Science | 1092 |
3 |
| NuFlare Technology America, Inc. | 23 |
3 |
| Philips Intellectual Property & Standards GmbH | 1813 |
3 |
| Hitachi High-Tech Corporation | 5490 |
3 |
| Hitachi High-Technologies Corporation | 1996 |
2 |
| Asahi Glass Company, Limited | 2730 |
2 |
| Colorado State University Research Foundation | 715 |
2 |
| The Government of the United States of America, as represented by the Secretary of the Navy | 1367 |
2 |
| Other owners | 57 |