H01J 25/12
With pencil-like electron stream in the axis of the resonators
Official title: with pencil-like electron stream in the axis of the resonators
H01J25/12 (With pencil-like electron stream in the axis of the resonators) appears on 17 US grants and 5 published applications in this corpus.
Search patents in H01J- Granted patents
- 17
- Published applications
- 5
- Assignees
- 11
- Inventors
- 33
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 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 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Klystron device30 Sep 2025US 12,431,316 B2Canon Electron Tubes & Devices Co., Ltd.
- Left-handed material extended interaction klystron17 Sep 2019US 10,418,219 B2University of Electronic Science and Technology of China
- Beam current measuring device and charged particle beam irradiation apparatus5 Mar 2019US 10,222,400 B2Nissin Ion Equipment Co., Ltd.
- Vacuum electron device drift tube22 Aug 2017US 9,741,521 B1Varex Imaging Corporation
- Cooling device for an electron tube27 Dec 2005US 6,979,939 B2Thales
- Klystron device4 Jan 2024US 2024/0006143 A1Canon Electron Tubes & Devices Co., Ltd.
- Klystron16 Apr 2020US 2020/0118782 A1Canon Electron Tubes & Devices Co., Ltd.
- Left-handed material extended interaction klystron21 Feb 2019US 2019/0057831 A1University of Electronic Science and Technology of China
- Beam current measuring device and charged particle beam irradiation apparatus22 Mar 2018US 2018/0080959 A1Nissin Ion Equipment Co., Ltd.
- Cooling device for an electron tube22 Jan 2004US 2004/0011506 A1Thales
Most cited
By later US patents
- Beam tube with density plus velocity modulation16US 4,611,149 AVarian Associates, Inc. · 1986
- Klystron unit14US 4,558,258 ATokyo Shibaura Denki Kabushiki Kaisha · 1985
- Klystron having electrostatic quadrupole focusing arrangement6US 4,401,918 A1983
- Multiple-beam microwave tube with groups of adjacent cavities6US 5,235,249 AThomson Tubes Electroniques · 1993
- Vacuum electron device drift tube6US 9,741,521 B1Varex Imaging Corporation · 2017