- 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: 156
10-year publication summary
|
7
|
6
|
9
|
12
|
10
|
9
|
11
|
5
|
8
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hon Hai Precision Industry Co., Ltd. | 4157 |
16 |
| Tsinghua University | 5426 |
15 |
| Denka Company Limited | 2189 |
10 |
| General Electric Company | 18133 |
8 |
| NuFlare Technology, Inc. | 770 |
7 |
| Koninklijke Philips Electronics N.V. | 13133 |
6 |
| OSRAM GmbH | 2442 |
5 |
| PLANSEE SE | 233 |
5 |
| ASML Netherlands B.V. | 6816 |
3 |
| Applied Physics Technologies, Inc. | 12 |
3 |
| Beijing University of Technology | 437 |
3 |
| NuFlare Technology America, Inc. | 21 |
3 |
| Philips Intellectual Property & Standards GmbH | 2395 |
3 |
| Hitachi High-Tech Corporation | 4424 |
3 |
| Hitachi High-Technologies Corporation | 2034 |
2 |
| Asahi Glass Company, Limited | 2985 |
2 |
| Colorado State University Research Foundation | 675 |
2 |
| The Government of the United States of America, as represented by the Secretary of the Navy | 1102 |
2 |
| National Institute for Materials Science | 1108 |
2 |
| Varex Imaging Corporation | 294 |
2 |
| Other owners | 54 |