- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 21/20 - Tubes with more than one discharge pathMultiple tubes, e.g. double diode or triode-hexode
Patent holdings for IPC class H01J 21/20
Total number of patents in this class: 12
10-year publication summary
|
1
|
2
|
0
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0
|
1
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1
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1
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0
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1
|
0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Purdue Research Foundation | 3593 |
2 |
| British Telecommunications Public Limited Company | 2622 |
1 |
| Electronics and Telecommunications Research Institute | 9380 |
1 |
| Tokyo Electron Limited | 12681 |
1 |
| STMicroelectronics S.r.l. | 3612 |
1 |
| STMicroelectronics Pte Ltd. | 80 |
1 |
| Elbit Systems of America, LLC | 188 |
1 |
| Ocumetrics, Inc. | 1 |
1 |
| Oerlikon Surface Solutions AG, Pfaffikon | 542 |
1 |
| SELEX ES S.p.A. | 42 |
1 |
| SELEX Sistemi Integrati S.p.A. | 33 |
1 |
| Other owners | 0 |