G01R 31/255
Testing of transit-time tubes
Official title: {Testing of transit-time tubes, e.g. klystrons, magnetrons}
G01R31/255 (Testing of transit-time tubes) appears on 5 US grants and 1 published applications in this corpus.
Search patents in G01R- Granted patents
- 5
- Published applications
- 1
- Assignees
- 5
- Inventors
- 10
- Latest grant
- 22 May 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for inspecting magnetron22 May 2018US 9,977,070 B2Tokyo Electron Limited
- Sensor-based feedback method for improved assembly of vacuum electronic devices22 Feb 2011US 7,891,078 B1The United States of America as represented by the Secretary of the Navy
- Method and apparatus for detecting magnetron power supply failure19 Sep 1989US 4,868,509 AFusion Systems Corporation
- Apparatus for counteracting the cathode current increase occurring during warming-up in a travelling-wave tube in response to variation in the grid-cathode distance11 Sep 1984US 4,471,265 ATelefonaktiebolaget L M Ericsson
- Traveling wave tube body current sensor3 Feb 1976US 3,936,732 AThe United States of America as represented by the Secretary of the Air Force
Most cited
By later US patents
- Method and apparatus for detecting magnetron power supply failure10US 4,868,509 AFusion Systems Corporation · 1989
- Apparatus for counteracting the cathode current increase occurring during warming-up in a travelling-wave tube in response to variation in the grid-cathode distance4US 4,471,265 ATelefonaktiebolaget L M Ericsson · 1984
- Traveling wave tube body current sensor3US 3,936,732 AThe United States of America as represented by the Secretary of the Air Force · 1976
- Sensor-based feedback method for improved assembly of vacuum electronic devices1US 7,891,078 B1The United States of America as represented by the Secretary of the Navy · 2011