H01J 25/04
Tubes having one or more resonators, without reflection of the electron stream
Official title: Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube
H01J25/04 (Tubes having one or more resonators, without reflection of the electron stream) appears on 57 US grants and 25 published applications in this corpus.
Search patents in H01J- Granted patents
- 57
- Published applications
- 25
- Assignees
- 27
- Inventors
- 75
- Latest grant
- 4 Aug 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 3 |
| 2003 | 1 | 1 |
| 2004 | 0 | 5 |
| 2005 | 0 | 0 |
| 2006 | 3 | 5 |
| 2007 | 1 | 3 |
| 2008 | 3 | 1 |
| 2009 | 3 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Ultra-high efficiency single-beam and multi-beam inductive output tubes4 Aug 2020US 10,734,182 B2Georgia Tech Research Corporation
- Equilibration of a multibeam inductive output tube26 Nov 2019US 10,490,383 B2Thales
- Photocathode high-frequency electron-gun cavity apparatus29 Dec 2015US 9,224,571 B2High Energy Accelerator Research Organization
- Active electronically steered cathode emission11 Dec 2012US 8,330,345 B2L-3 Communications Corporation
- Grid for vacuum electron device and method for manufacture of same2 Oct 2012US 8,278,812 B2Communications & Power Industries, Inc.
- Travelling-Wave Tube, Electron Gun, and Power Amplification System27 Feb 2025US 2025/0070736 A1Huawei Technologies Co., Ltd.
- Ultra-High Efficiency Single-beam and Multi-beam Inductive Output Tubes9 Apr 2020US 2020/0111636 A1Georgia Tech Research Corporation
- Equilibration of a multibeam inductive output tube11 Oct 2018US 2018/0294132 A1Thales
- Photocathode high-frequency electron-gun cavity apparatus25 Jul 2013US 2013/0187541 A1High Energy Accelerator Research Organization
- Active electronically steered cathode emission3 Mar 2011US 2011/0050096 A1L-3 Communications Corporation
Most cited
By later US patents
- Inductive output tube (IOT) amplifier system26US 6,232,721 B1Harris Corporation · 2001
- Process for preparing esters from ethers or esters of lower homologous alcohols23US 4,189,441 AMontedison S.p.A. · 1980
- Gridded electron power tube23US 4,480,210 AVarian Associates, Inc. · 1984
- Inductive output tube with multistage depressed collector electrodes providing a near-constant efficiency19US 5,650,751 ALitton Systems, Inc. · 1997
- Vacuum tube including grid-cathode assembly with resonant slow-wave structure18US 5,317,233 AVarian Associates, Inc. · 1994