H01J 23/20
Cavity resonators
Official title: Cavity resonators; Adjustment or tuning thereof
H01J23/20 (Cavity resonators) appears on 175 US grants and 64 published applications in this corpus.
Search patents in H01J- Granted patents
- 175
- Published applications
- 64
- Assignees
- 79
- Inventors
- 274
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 10 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 8 | 0 |
| 1996 | 9 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 5 |
| 2003 | 5 | 5 |
| 2004 | 4 | 6 |
| 2005 | 4 | 4 |
| 2006 | 5 | 1 |
| 2007 | 2 | 2 |
| 2008 | 2 | 2 |
| 2009 | 1 | 4 |
| 2010 | 2 | 1 |
| 2011 | 3 | 2 |
| 2012 | 1 | 2 |
| 2013 | 3 | 1 |
| 2014 | 1 | 3 |
| 2015 | 2 | 1 |
| 2016 | 1 | 3 |
| 2017 | 7 | 2 |
| 2018 | 1 | 3 |
| 2019 | 5 | 2 |
| 2020 | 1 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 5 |
| 2023 | 3 | 2 |
| 2024 | 0 | 1 |
| 2025 | 2 | 4 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power supply device for gyrotron and power control method1 Sep 2026US 12,725,752 B2Kyoto Fusioneering Ltd.
- Radiotherapy device and microwave source thereof12 May 2026US 12,623,089 B2Shanghai United Imaging Healthcare Co., Ltd.
- Magnetron10 Feb 2026US 12,548,729 B2Hitachi Power Solutions Co., Ltd.
- RF source protection9 Sep 2025US 12,414,221 B2Elekta Limited
- Magnetron7 Jan 2025US 12,191,107 B2Panasonic Intellectual Property Management Co., Ltd.
- Klystron27 Nov 2025US 2025/0364202 A1Canon Electron Tubes & Devices Co., Ltd.
- Compact mode converter waveguide13 Nov 2025US 2025/0349486 A1Varian Medical Systems, Inc.
- Power supply device for gyrotron and power control method10 Jul 2025US 2025/0226169 A1Kyoto Fusioneering Ltd.
- Magnetron30 Jan 2025US 2025/0037957 A1Hitachi Power Solutions Co., Ltd.
- Methods and apparatuses for training a model based reinforcement learning model14 Nov 2024US 2024/0378450 A1Telefonaktiebolaget LM Ericsson (publ)
Most cited
By later US patents
- Optical magnetron for high efficiency production of optical radiation59US 6,373,194 B1Raytheon Company · 2002
- Wideband electronic frequency tuning for orotrons55US 4,829,527 AThe United States of America as represented by the Secretary of the Army · 1989
- Optical magnetron generator54US 6,525,477 B2Raytheon Company · 2003
- Optical magnetron for high efficiency production of optical radiation, and 1/2λ induced pi-mode operation53US 6,504,303 B2Raytheon Company · 2003
- Wireless communication system with high efficiency/high power optical source39US 7,257,327 B2Raytheon Company · 2007