H01J 23/00
Details of transit-time tubes of the types covered by group h01j25/00
Official title: Details of transit-time tubes of the types covered by group H01J25/00
H01J23/00 (Details of transit-time tubes of the types covered by group h01j25/00) appears on 1,314 US grants and 508 published applications in this corpus.
Search patents in H01J- Granted patents
- 1,314
- Published applications
- 508
- Assignees
- 347
- Inventors
- 1,657
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 38 | 0 |
| 1977 | 29 | 0 |
| 1978 | 36 | 0 |
| 1979 | 27 | 0 |
| 1980 | 30 | 0 |
| 1981 | 45 | 0 |
| 1982 | 24 | 0 |
| 1983 | 29 | 0 |
| 1984 | 28 | 0 |
| 1985 | 36 | 0 |
| 1986 | 26 | 0 |
| 1987 | 44 | 0 |
| 1988 | 33 | 0 |
| 1989 | 44 | 0 |
| 1990 | 20 | 0 |
| 1991 | 33 | 0 |
| 1992 | 33 | 0 |
| 1993 | 25 | 0 |
| 1994 | 35 | 0 |
| 1995 | 37 | 0 |
| 1996 | 32 | 0 |
| 1997 | 26 | 0 |
| 1998 | 29 | 0 |
| 1999 | 29 | 0 |
| 2000 | 20 | 0 |
| 2001 | 25 | 8 |
| 2002 | 33 | 25 |
| 2003 | 30 | 25 |
| 2004 | 23 | 34 |
| 2005 | 22 | 22 |
| 2006 | 30 | 31 |
| 2007 | 17 | 26 |
| 2008 | 19 | 23 |
| 2009 | 20 | 22 |
| 2010 | 16 | 13 |
| 2011 | 18 | 23 |
| 2012 | 16 | 21 |
| 2013 | 19 | 19 |
| 2014 | 27 | 23 |
| 2015 | 33 | 16 |
| 2016 | 19 | 20 |
| 2017 | 28 | 16 |
| 2018 | 11 | 16 |
| 2019 | 30 | 23 |
| 2020 | 18 | 16 |
| 2021 | 15 | 16 |
| 2022 | 10 | 17 |
| 2023 | 12 | 13 |
| 2024 | 16 | 14 |
| 2025 | 13 | 17 |
| 2026 | 6 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 23/02Electrodes605
- H01J 23/16Circuit elements, having distributed capacitance and inductance, structurally associated with the tube456
- H01J 23/36Coupling devices having distributed capacitance and inductance, structurally associated with the tube192
- H01J 23/005Cooling methods or arrangements88
- H01J 23/14Leading-in arrangements82
- H01J 23/34Circuit arrangements not adapted to a particular application of the tube and66
- H01J 23/12Vessels55
Recent patents
- Klystrons and medical electron linear accelerators8 Sep 2026US 12,731,751 B2Shanghai United Imaging Healthcare Co., Ltd.
- Power supply device for gyrotron and power control method1 Sep 2026US 12,725,752 B2Kyoto Fusioneering Ltd.
- Radiotherapy device and microwave source thereof12 May 2026US 12,623,089 B2Shanghai United Imaging Healthcare Co., Ltd.
- High-frequency coaxial input coupler including a transmission window that couples a waveguide to an acceleration cavity17 Mar 2026US 12,580,287 B2Canon Electron Tubes & Devices Co., Ltd.
- Magnetron10 Feb 2026US 12,548,729 B2Hitachi Power Solutions Co., Ltd.
- Tungsten alloy wire, preparation method therefor and use thereof, and tungsten carbide alloy filament13 Aug 2026US 2026/0234761 A1Xiamen Honglu Tungsten Molybdenum Industry Co., Ltd.
- Electron tube6 Aug 2026US 2026/0229442 A1Nisshinbo Micro Devices Inc.
- Cathode and manufacturing method thereof23 Jul 2026US 2026/0213111 A1Shanghai United Imaging Healthcare Co., Ltd.
- Electromagnetic radiation generation2 Jul 2026US 2026/0188529 A1United Kingdom Atomic Energy Authority
- Insulative assemblies, microwave vacuum tube assemblies and radiotherapy machines including the same23 Apr 2026US 2026/0108764 A1Varian Medical Systems, Inc.
Most cited
By later US patents
- Slotted dielectric-lined waveguide couplers and windows231US 5,043,629 AGeneral Atomics · 1991
- Wide-band distributed rf coupler230US 4,567,401 AThe United States of America as represented by the Secretary of the Navy · 1986
- Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide229US 5,015,914 AVarian Associates, Inc. · 1991
- Quasi-optical coupler with reduced diffraction229US 5,652,554 AThomson Tubes Electroniques · 1997
- Gyrotron having a quasi-optical mode converter225US 5,187,409 AKabushiki Kaisha Toshiba · 1993