H01J 21/20
Tubes with more than one discharge path
Official title: Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode
H01J21/20 (Tubes with more than one discharge path) appears on 24 US grants and 16 published applications in this corpus.
Search patents in H01J- Granted patents
- 24
- Published applications
- 16
- Assignees
- 22
- Inventors
- 61
- Latest grant
- 19 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 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 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 3 | 0 |
| 2009 | 0 | 1 |
| 2010 | 2 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 2 | 2 |
| 2015 | 3 | 1 |
| 2016 | 0 | 1 |
| 2017 | 2 | 2 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 2 | 2 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Vacuum tube for amplifier circuit, and amplifier circuit using same19 Nov 2024US 12,149,214 B2Hamamatsu Photonics K.K.
- Silicon-based vacuum transistors and integrated circuits3 Sep 2024US 12,080,506 B2Purdue Research Foundation
- Silicon-based vacuum transistors and integrated circuits5 Sep 2023US 11,749,487 B2Purdue Research Foundation
- Analog amplification vacuum tube13 Jul 2021US 11,062,871 B2Noritake Co., Limited
- Vertical metal-air transistor4 May 2021US 10,998,424 B2International Business Machines Corporation
- Silicon-Based Vacuum Transistors and Integrated Circuits6 Jun 2024US 2024/0186097 A1Purdue Research Foundation
- Silicon-based vacuum transistors and integrated circuits22 Sep 2022US 2022/0301805 A1Purdue Research Foundation
- Vacuum tube for amplifier circuit, and amplifier circuit using same9 Dec 2021US 2021/0384871 A1Hamamatsu Photonics K.K.
- Vertical metal-air transistor18 Mar 2021US 2021/0083075 A1International Business Machines Corporation
- Analog amplification vacuum tube15 Oct 2020US 2020/0328057 A1Noritake Co., Limited
Most cited
By later US patents
- Electron beam RF amplifier and emitter43US 7,446,601 B2Astronix Research, LLC · 2008
- Electron beam RF amplifier and emitter30US 7,671,687 B22010
- Vacuum integrated circuit12US 4,712,039 A1987
- Method of manufacturing a fully integrated and encapsulated micro-fabricated vacuum diode6US 8,814,622 B1Sandia Corporation · 2014
- Field emission device as charge transport switch for energy storage network4US 5,432,407 AMotorola, Inc. · 1995