H01J 25/50
Magnetrons, i.e. tubes with a magnet system producing an h-field crossing the
Official title: Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field (with travelling wave not moving completely around the electron space H01J25/42; functioning with plural reflection or with reversed cyclotron action H01J25/62, H01J25/64)
H01J25/50 (Magnetrons, i.e. tubes with a magnet system producing an h-field crossing the) appears on 247 US grants and 206 published applications in this corpus.
Search patents in H01J- Granted patents
- 247
- Published applications
- 206
- Assignees
- 107
- Inventors
- 405
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 2 |
| 2002 | 5 | 6 |
| 2003 | 9 | 9 |
| 2004 | 9 | 21 |
| 2005 | 10 | 12 |
| 2006 | 15 | 7 |
| 2007 | 9 | 9 |
| 2008 | 4 | 8 |
| 2009 | 6 | 12 |
| 2010 | 4 | 2 |
| 2011 | 8 | 11 |
| 2012 | 8 | 7 |
| 2013 | 6 | 9 |
| 2014 | 11 | 9 |
| 2015 | 12 | 6 |
| 2016 | 7 | 5 |
| 2017 | 9 | 7 |
| 2018 | 6 | 7 |
| 2019 | 14 | 10 |
| 2020 | 8 | 9 |
| 2021 | 8 | 7 |
| 2022 | 5 | 12 |
| 2023 | 6 | 5 |
| 2024 | 4 | 5 |
| 2025 | 5 | 8 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inspection system and method23 Jun 2026US 12,663,388 B2Nuctech Company Limited
- 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.
- Circuit and method for regulating currents to multiple loads14 Oct 2025US 12,444,898 B1The United States of America as represented by the Secretary of the Air Force
- RF source protection9 Sep 2025US 12,414,221 B2Elekta Limited
- Electron tube6 Aug 2026US 2026/0229442 A1Nisshinbo Micro Devices Inc.
- Vacuum and High Pressure RF System for Medical Linear Accelerators20 Nov 2025US 2025/0352825 A1Varian Medical Systems, Inc.
- Control Circuit And Microwave Generation Device20 Nov 2025US 2025/0357064 A1Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd.
- Compact mode converter waveguide13 Nov 2025US 2025/0349486 A1Varian Medical Systems, Inc.
- Magnetron and Microwave Heating Device10 Jul 2025US 2025/0227822 A1Guangdong Witol Vacuum Electronic Manufacture Co., Ltd.
Most cited
By later US patents
- Magnetron for microwave oven123US 5,294,864 AGoldstar Co., Ltd. · 1994
- Optical magnetron for high efficiency production of optical radiation59US 6,373,194 B1Raytheon Company · 2002
- 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