H03B 5/28
Active element in amplifier being vacuum tube
Official title: active element in amplifier being vacuum tube
H03B5/28 (Active element in amplifier being vacuum tube) appears on 2 US grants and 1 published applications in this corpus.
Search patents in H03B- Granted patents
- 2
- Published applications
- 1
- Assignees
- 2
- Inventors
- 4
- Latest grant
- 13 Dec 2016
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| Year | Granted patents | Published applications |
|---|---|---|
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
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