- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 21/20 - Tubes with more than one discharge path; Multiple tubes, e.g. double diode or triode-hexode
Patent holdings for IPC class H01J 21/20
Total number of patents in this class: 15
10-year publication summary
|
1
|
1
|
2
|
0
|
0
|
1
|
0
|
1
|
0
|
0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hamamatsu Photonics K.K. | 4161 |
4 |
| British Telecommunications Public Limited Company | 2575 |
1 |
| Electronics and Telecommunications Research Institute | 8830 |
1 |
| Tokyo Electron Limited | 11599 |
1 |
| STMicroelectronics S.r.l. | 3693 |
1 |
| STMicroelectronics Pte Ltd. | 180 |
1 |
| Purdue Research Foundation | 3277 |
1 |
| Elbit Systems of America, LLC | 194 |
1 |
| Ocumetrics, Inc. | 1 |
1 |
| Safran Electronics & Defense | 1130 |
1 |
| SELEX ES S.p.A. | 42 |
1 |
| SELEX Sistemi Integrati S.p.A. | 34 |
1 |
| Other owners | 0 |