H01J 19/04
Thermionic cathodes
H01J19/04 (Thermionic cathodes) appears on 41 US grants and 28 published applications in this corpus.
Search patents in H01J- Granted patents
- 41
- Published applications
- 28
- Assignees
- 39
- Inventors
- 86
- Latest grant
- 19 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 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 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 3 |
| 2016 | 4 | 2 |
| 2017 | 5 | 7 |
| 2018 | 3 | 3 |
| 2019 | 5 | 2 |
| 2020 | 3 | 1 |
| 2021 | 3 | 4 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 1 | 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.
- Method for sterilizing ambient air using plasma-based smart window12 Sep 2023US 11,752,233 B2Ming Chi University of Technology
- Electrode component for generating large area atmospheric pressure plasma5 Apr 2022US 11,291,744 B2Ming Chi University of Technology
- Thin-film electrochemical device, method of making a thin-film electrochemical device, and energy converting device14 Sep 2021US 11,121,392 B2King Abdullah University of Science and Technology
- Analog amplification vacuum tube13 Jul 2021US 11,062,871 B2Noritake Co., Limited
- Vacuum tube for amplifier circuit, and amplifier circuit using same9 Dec 2021US 2021/0384871 A1Hamamatsu Photonics K.K.
- Method for Sterilizing Ambient Air Using Plasma-Based Smart Window4 Mar 2021US 2021/0060201 A1Ming Chi University of Technology
- Electrode component for generating large area atmospheric pressure plasma4 Mar 2021US 2021/0068242 A1Ming Chi University of Technology
- Annular cathode for vacuum tube14 Jan 2021US 2021/0012994 A1Thales
- Analog amplification vacuum tube15 Oct 2020US 2020/0328057 A1Noritake Co., Limited
Most cited
By later US patents
- Grid controlled electron source and method of making same23US 3,967,150 AVarian Associates, Inc. · 1976
- Microminiature thermionic vacuum tube16US 5,841,219 AUniversity of Utah Research Foundation · 1998
- Thermionic electron source with bonded control grid13US 4,096,406 AVarian Associates, Inc. · 1978
- Solid state vacuum devices and method for making the same10US 7,005,783 B2InnoSys, Inc. · 2006
- Thermionic electron emitters/collectors have a doped diamond layer with variable doping concentrations10US 8,188,456 B2North Carolina State University · 2012