H01J 19/38
Control electrodes
Official title: Control electrodes, e.g. grid
H01J19/38 (Control electrodes) appears on 49 US grants and 35 published applications in this corpus.
Search patents in H01J- Granted patents
- 49
- Published applications
- 35
- Assignees
- 36
- Inventors
- 109
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 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 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 5 |
| 2014 | 4 | 3 |
| 2015 | 4 | 4 |
| 2016 | 0 | 3 |
| 2017 | 7 | 5 |
| 2018 | 2 | 2 |
| 2019 | 4 | 3 |
| 2020 | 5 | 2 |
| 2021 | 4 | 3 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for amplifying electromagnetic waves with wirebonded triode23 Dec 2025US 12,505,971 B2
- Vacuum tube for amplifier circuit, and amplifier circuit using same19 Nov 2024US 12,149,214 B2Hamamatsu Photonics K.K.
- Triode with wirebonded structure and method of making23 Jan 2024US 11,881,373 B2
- Device for controlling electron flow and method for manufacturing said device16 Nov 2021US 11,177,104 B2Evince Technology Limited
- Device for controlling electron flow and method for manufacturing said device17 Aug 2021US 11,094,496 B2Evince Technology Limited
- Method for amplifying electromagnetic waves with wirebonded triode16 May 2024US 2024/0161995 A1
- Triode with wirebonded structure and method of making13 Jul 2023US 2023/0223229 A1
- Vacuum tube for amplifier circuit, and amplifier circuit using same9 Dec 2021US 2021/0384871 A1Hamamatsu Photonics K.K.
- Device for Controlling Electron Flow and Method for Manufacturing Said Device27 May 2021US 2021/0159039 A1Evince Technology Limited
- Vertical metal-air transistor18 Mar 2021US 2021/0083075 A1International Business Machines Corporation
Most cited
By later US patents
- Electrodes, for example grid-like electrodes for use in electron tubes, and a method for manufacturing same17US 4,137,477 AU. S. Philips Corporation · 1979
- Grid of pyrolytic graphite for a high-power electron tube and a method for the assembly of said grid10US 4,229,674 AThomson-CSF · 1980
- Field emission device10US 8,575,842 B2Elwha LLC · 2013
- Cylindric grid electrode structure for electronic tubes comprising carbon filaments coated with pyrolytic graphite7US 3,971,964 ABBC Brown, Boveri & Company, Limited · 1976
- Grid support means for a planar tube6US 3,934,168 AVarian Associates, Inc. · 1976