- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 23/20 - Cavity resonatorsAdjustment or tuning thereof
Patent holdings for IPC class H01J 23/20
Total number of patents in this class: 34
10-year publication summary
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1
|
2
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5
|
3
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3
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3
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4
|
2
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2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| University of Virginia Patent Foundation | 1569 |
3 |
| Canon Electron Tubes & Devices Co., Ltd. | 164 |
3 |
| Panasonic Corporation | 20128 |
2 |
| NEC Network and Sensor Systems, Ltd. | 47 |
2 |
| Stc.unm | 678 |
2 |
| Telefonaktiebolaget LM Ericsson (publ) | 27878 |
2 |
| Samsung Electronics Co., Ltd. | 145630 |
1 |
| Mitsubishi Electric Corporation | 45998 |
1 |
| Panasonic Intellectual Property Management Co., Ltd. | 31273 |
1 |
| Lockheed Martin Corporation | 3277 |
1 |
| Advanced Fusion Systems LLC | 68 |
1 |
| Hitachi Power Solutions Co., Ltd. | 97 |
1 |
| InnoSys, Inc. | 19 |
1 |
| ION Beam Applications S.A. | 188 |
1 |
| Jefferson Science Associates, LLC | 105 |
1 |
| Korea Electrotechnology Research Institute | 471 |
1 |
| MKS Instruments, Inc. | 652 |
1 |
| New Japan Radio Co., Ltd. | 89 |
1 |
| New Japan Radio, Ltd | 2 |
1 |
| POSTECH Academy-industry Foundation | 1090 |
1 |
| Other owners | 6 |