H01J 25/10
Klystrons, i.e. tubes having two or more resonators, without reflection of the
Official title: Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
H01J25/10 (Klystrons, i.e. tubes having two or more resonators, without reflection of the) appears on 102 US grants and 47 published applications in this corpus.
Search patents in H01J- Granted patents
- 102
- Published applications
- 47
- Assignees
- 59
- Inventors
- 187
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 2 | 2 |
| 2004 | 1 | 3 |
| 2005 | 4 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 3 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 4 |
| 2012 | 3 | 2 |
| 2013 | 7 | 4 |
| 2014 | 4 | 4 |
| 2015 | 4 | 2 |
| 2016 | 1 | 2 |
| 2017 | 3 | 0 |
| 2018 | 0 | 2 |
| 2019 | 8 | 5 |
| 2020 | 0 | 2 |
| 2021 | 0 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 2 |
| 2025 | 1 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 25/12With pencil-like electron stream in the axis of the resonators17
- H01J 25/11Extended interaction klystrons13
- H01J 25/14With tube-like electron stream coaxial with the axis of the resonators9
- H01J 25/20Having special arrangements in the space between resonators5
- H01J 25/16With pencil-like electron stream perpendicular to the axis of the resonators1
- H01J 25/18With radial or disc-like electron stream perpendicular to the axis of the1
Recent patents
- Klystrons and medical electron linear accelerators8 Sep 2026US 12,731,751 B2Shanghai United Imaging Healthcare Co., Ltd.
- Klystron device30 Sep 2025US 12,431,316 B2Canon Electron Tubes & Devices Co., Ltd.
- Klystron25 Jun 2024US 12,020,891 B2Canon Electron Tubes & Devices Co., Ltd.
- Electron gun and manufacturing method therefor6 Sep 2022US 11,437,214 B2New Japan Radio Co., Ltd.
- Electron beam 3D printing machine28 Jun 2022US 11,370,055 B2Consorzio Di Ricerca Hypatia
- Klystron27 Nov 2025US 2025/0364202 A1Canon Electron Tubes & Devices Co., Ltd.
- Vacuum and High Pressure RF System for Medical Linear Accelerators20 Nov 2025US 2025/0352825 A1Varian Medical Systems, Inc.
- Large electron tube, magnetic body, and method for using large electron tube30 Jan 2025US 2025/0037959 A1National Institutes for Quantum Science and Technology
- Klystrons and medical electron linear accelerators10 Oct 2024US 2024/0339281 A1Shanghai United Imaging Healthcare Co., Ltd.
- Klystron device4 Jan 2024US 2024/0006143 A1Canon Electron Tubes & Devices Co., Ltd.
Most cited
By later US patents
- Field emission devices32US 5,124,664 AGeneral Electric Company · 1992
- Density modulated electron beam tube with enhanced gain25US 4,527,091 AVarian Associates, Inc. · 1985
- Multiple-beam klystron22US 4,733,131 AThomson-CSF · 1988
- Electron gun for multiple beam klystron using magnetic focusing18US 6,768,265 B1Calabazas Creek Research, Inc. · 2004
- High power klystron amplifier for supplying a variable load16US 4,591,799 AThomson-CSF · 1986