H03K 3/543
The switching device being a vacuum tube
Official title: the switching device being a vacuum tube
H03K3/543 (The switching device being a vacuum tube) appears on 6 US grants and 2 published applications in this corpus.
Search patents in H03K- Granted patents
- 6
- Published applications
- 2
- Assignees
- 7
- Inventors
- 15
- Latest grant
- 7 Apr 2026
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 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 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 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for generating high voltage pulses7 Apr 2026US 12,597,912 B1Radiance Technologies, Inc.
- Method and apparatus for interlaced amplitude pulsing using a hard-tube type pulse generator1 May 2018US 9,960,754 B2Varex Imaging Corporation
- Ignition system with a field emitter coupled to the spark plug19 Oct 1999US 5,969,480 ADaimler-Benz Aktiengesellschaft
- Charge line quad pulser8 Oct 1996US 5,563,457 AThe Regents of the University of California
- Magnetically operated pulser10 Sep 1991US 5,048,068 A
Most cited
By later US patents
- TWT grid circuit utilizing feedback13US 4,000,471 AThe United States of America as represented by the Secretary of the Navy · 1976
- Ignition system with a field emitter coupled to the spark plug5US 5,969,480 ADaimler-Benz Aktiengesellschaft · 1999
- Magnetically operated pulser3US 5,048,068 A1991
- Charge line quad pulser1US 5,563,457 AThe Regents of the University of California · 1996