- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 23/05 - Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
Patent holdings for IPC class H01J 23/05
Total number of patents in this class: 25
10-year publication summary
|
4
|
2
|
1
|
2
|
3
|
1
|
1
|
3
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Toshiba Corporation | 12017 |
5 |
| Toshiba Materials Co., Ltd. | 600 |
4 |
| E2V Technologies (UK) Limited | 33 |
3 |
| BAE Systems Bofors AB | 187 |
2 |
| Teledyne UK Limited | 29 |
2 |
| Applied Materials, Inc. | 16587 |
1 |
| Raytheon Company | 8535 |
1 |
| Tsinghua University | 5426 |
1 |
| Beijing University of Technology | 437 |
1 |
| Korea Electrotechnology Research Institute | 411 |
1 |
| MKS Instruments, Inc. | 698 |
1 |
| Shanghai United Imaging Healthcare Co., Ltd. | 1569 |
1 |
| Toshiba Hokuto Electronics Corporation | 27 |
1 |
| The United States of America as represented by the Secretary of the Air Force | 754 |
1 |
| Other owners | 0 |