- 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: 26
10-year publication summary
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1
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2
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3
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1
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1
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3
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1
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0
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1
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Toshiba Corporation | 12698 |
5 |
| Toshiba Materials Co., Ltd. | 595 |
4 |
| E2V Technologies (UK) Limited | 32 |
3 |
| BAE Systems Bofors AB | 204 |
2 |
| Teledyne UK Limited | 22 |
2 |
| Applied Materials, Inc. | 19938 |
1 |
| Raytheon Company | 8469 |
1 |
| Tsinghua University | 6101 |
1 |
| Beijing University of Technology | 512 |
1 |
| Korea Electrotechnology Research Institute | 479 |
1 |
| MKS Instruments, Inc. | 569 |
1 |
| Shanghai United Imaging Healthcare Co., Ltd. | 2040 |
1 |
| Toshiba Hokuto Electronics Corporation | 26 |
1 |
| The United States of America as represented by the Secretary of the Air Force | 896 |
1 |
| Xiamen Honglu Tungsten Molybdenum Industry Co., Ltd | 13 |
1 |
| Other owners | 0 |