H01J 19/28
Non-electron-emitting electrodes
Official title: Non-electron-emitting electrodes; Screens
H01J19/28 (Non-electron-emitting electrodes) appears on 75 US grants and 51 published applications in this corpus.
Search patents in H01J- Granted patents
- 75
- Published applications
- 51
- Assignees
- 52
- Inventors
- 151
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 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 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 2 | 0 |
| 2013 | 1 | 6 |
| 2014 | 5 | 5 |
| 2015 | 7 | 5 |
| 2016 | 1 | 6 |
| 2017 | 8 | 6 |
| 2018 | 5 | 4 |
| 2019 | 6 | 4 |
| 2020 | 7 | 4 |
| 2021 | 4 | 3 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
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.
- Systems and methods for creating an electron coil magnet17 Sep 2024US 12,094,679 B2Vacon Oy
- 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
- 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
- Systems and methods for creating an electron coil magnet23 Mar 2023US 2023/0093623 A1Vacon Oy
- 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
Most cited
By later US patents
- Diamond target electron beam device23US 5,592,053 AKobe Steel USA, Inc. · 1997
- 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
- Micro-vacuum device17US 5,977,693 AKabushiki Kaisha Toshiba · 1999
- X-ray generation device having multiple metal target members12US 10,115,557 B2Hamamatsu Photonics K.K. · 2018
- 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