H01J 21/14
Tubes with means for concentrating the electron stream
Official title: Tubes with means for concentrating the electron stream, e.g. beam tetrode
H01J21/14 (Tubes with means for concentrating the electron stream) appears on 8 US grants and 0 published applications in this corpus.
Search patents in H01J- Granted patents
- 8
- Published applications
- 0
- Assignees
- 6
- Inventors
- 18
- Latest grant
- 27 Apr 1993
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- High-power low-voltage tetrode having a full walled matrix cathode and a control grid spacing of less than 1 mm27 Apr 1993US 5,206,565 AAsea Brown Boveri AG
- Electron-beam tube4 Sep 1984US 4,469,982 AVsesojuzny Energetichesky Institut Imeni V. I. Lenina
- EBS Device with cold-cathode18 Oct 1983US 4,410,832 AThe United States of America as represented by the Secretary of the Army
- Heterojunction-diode transistor EBS amplifier18 Oct 1983US 4,410,903 AThe United States of America as represented by the Secretary of the Navy
- Heterojunction and Schottky barrier EBS targets21 Sep 1982US 4,350,993 AThe United States of America as represented by the Secretary of the Navy
No published applications in this class yet.
Most cited
By later US patents
- Heterojunction and Schottky barrier EBS targets8US 4,350,993 AThe United States of America as represented by the Secretary of the Navy · 1982
- EBS Device with cold-cathode7US 4,410,832 AThe United States of America as represented by the Secretary of the Army · 1983
- Electron beam collimator6US 4,053,808 AU. S. Philips Corporation · 1977
- Heterojunction-diode transistor EBS amplifier6US 4,410,903 AThe United States of America as represented by the Secretary of the Navy · 1983
- Electron-beam converter1US 4,059,784 A1977