H01J 19/02
Electron-emitting electrodes
Official title: Electron-emitting electrodes; Cathodes
H01J19/02 (Electron-emitting electrodes) appears on 120 US grants and 87 published applications in this corpus.
Search patents in H01J- Granted patents
- 120
- Published applications
- 87
- Assignees
- 83
- Inventors
- 229
- Latest grant
- 19 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 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 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 2 | 3 |
| 2007 | 2 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 2 | 1 |
| 2012 | 1 | 4 |
| 2013 | 2 | 4 |
| 2014 | 2 | 4 |
| 2015 | 7 | 8 |
| 2016 | 11 | 7 |
| 2017 | 10 | 11 |
| 2018 | 8 | 10 |
| 2019 | 11 | 12 |
| 2020 | 17 | 5 |
| 2021 | 9 | 6 |
| 2022 | 2 | 3 |
| 2023 | 4 | 2 |
| 2024 | 5 | 0 |
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.
- Power supply module and charged particle beam device29 Oct 2024US 12,132,411 B2Hitachi High-Tech Corporation
- Power device and fabrication method thereof15 Oct 2024US 12,119,199 B2Institute of Microelectronics, Chinese Academy of Sciences
- Terahertz capable integrated circuit13 Aug 2024US 12,062,712 B2Averoses, Inc.
- Field emission device, field emission method and positioning and fixing method21 May 2024US 11,990,308 B2Meidensha Corporation
- Terahertz capable integrated circuit21 Sep 2023US 2023/0299184 A1Averoses, Inc.
- Field emission device, field emission method and positioning and fixing method22 Jun 2023US 2023/0197395 A1Meidensha Corporation
- Power device and fabrication method thereof13 Oct 2022US 2022/0328275 A1Institute of Microelectronics, Chinese Academy of Sciences
- Power Supply Module and Charged Particle Beam Device6 Oct 2022US 2022/0319795 A1Hitachi High-Tech Corporation
- Shaping Nanomaterials by Short Electrical Pulses6 Jan 2022US 2022/0005707 A1Board of Regents, The University of Texas System
Most cited
By later US patents
- Doped diamond for vacuum diode heat pumps and vacuum diode thermionic generators37US 6,214,651 B1Borealis Technical Limited · 2001
- Doped diamond for vacuum diode heat pumps and vacuum diode thermionic generators35US 5,981,071 ABorealis Technical Limited · 1999
- Grid controlled electron source and method of making same23US 3,967,150 AVarian Associates, Inc. · 1976
- Substrate-supported array having steerable nanowires elements use in electron emitting devices22US 7,233,101 B2Samsung Electronics Co., Ltd. · 2007
- Nanotube-based vacuum devices19US 7,102,157 B22006