H01J 2225/02
Tubes with electron stream modulated in velocity or density in a modulator
Official title: Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
H01J2225/02 (Tubes with electron stream modulated in velocity or density in a modulator) appears on 39 US grants and 11 published applications in this corpus.
Search patents in H01J- Granted patents
- 39
- Published applications
- 11
- Assignees
- 26
- Inventors
- 73
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1995 | 6 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 4 |
| 2003 | 4 | 2 |
| 2004 | 2 | 0 |
| 2005 | 3 | 0 |
| 2006 | 1 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 2225/10Klystrons, i.e. tubes having two or more resonators, without reflection of theIndexing code18
- H01J 2225/04Tubes having one or more resonators, without reflection of the electron streamIndexing code14
- H01J 2225/025With an electron stream following a helical pathIndexing code6
- H01J 2225/06Tubes having only one resonator, without reflection of the electron stream, andIndexing code0
- H01J 2225/22Reflex klystrons, i.e. tubes having one or more resonators, with a singleIndexing code0
- H01J 2225/32Tubes with plural reflectionIndexing code0
Recent patents
- Klystrons and medical electron linear accelerators8 Sep 2026US 12,731,751 B2Shanghai United Imaging Healthcare Co., Ltd.
- Electron beam tubes13 Jan 2009US 7,477,019 B2E2VV Technologies (UK) Limited
- L-band inductive output tube5 Dec 2006US 7,145,297 B2Communications & Power Industries, Inc.
- Multi-stage collector having electrode stages isolated by a distributed bypass capacitor12 Apr 2005US 6,879,208 B2Marconi Applied Technologies Limited
- Multiple stage depressed collector (MSDC) klystron based amplifier for ground based satellite and terrestrial communications22 Mar 2005US 6,870,318 B2Communications and Power Industries, Inc., Satcom Division
- Klystrons and medical electron linear accelerators10 Oct 2024US 2024/0339281 A1Shanghai United Imaging Healthcare Co., Ltd.
- L-band inductive output tube12 Apr 2007US 2007/0080762 A1Communications & Power Industries, Inc.
- Electron bean tubes13 Jul 2006US 2006/0152176 A1E2V Technologies (UK) Limited
- Electron gun4 May 2006US 2006/0091776 A1NEC Microwave Tube, Ltd.
- L-band inductive output tube4 May 2006US 2006/0091831 A1Communications and Power Industries, Inc., a Delaware Corporation
Most cited
By later US patents
- Quasi-optical coupler with reduced diffraction229US 5,652,554 AThomson Tubes Electroniques · 1997
- Multi-stage depressed collector for small orbit gyrotrons39US 5,780,970 ACalabazas Creek Research Center, Inc. · 1998
- Cylindrical permanent magnet unit suitable for gyrotron13US 5,576,679 AMitsubishi Denki Kabushiki Kaisha · 1996
- Tubular capacitor for use in an electron beam tube12US 6,781,313 B2Marconi Applied Technologies Limited · 2004
- Depressed collector for sorting radial energy level of a gyrating electron beam10US 5,420,478 ALitton Systems, Inc. · 1995