H01J 25/36
Tubes in which an electron stream interacts with a wave travelling along
Official title: Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
H01J25/36 (Tubes in which an electron stream interacts with a wave travelling along) appears on 62 US grants and 22 published applications in this corpus.
Search patents in H01J- Granted patents
- 62
- Published applications
- 22
- Assignees
- 36
- Inventors
- 117
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 3 | 2 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 2 | 3 |
| 2020 | 1 | 3 |
| 2021 | 1 | 2 |
| 2022 | 1 | 0 |
| 2023 | 2 | 1 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Traveling wave tube14 Oct 2025US 12,444,566 B2Raytheon Company
- Slow-wave circuit, traveling wave tube, and method for manufacturing traveling wave tube13 Aug 2024US 12,062,517 B2NEC Network and Sensor Systems, Ltd.
- Electron gun21 May 2024US 11,990,307 B2Thales Deutschland GmbH Electron Devices
- Method and device for spatial charged particle bunching14 Mar 2023US 11,605,522 B1NexGen Semi Holding, Inc.
- Electroplated helical slow-wave structures for high-frequency signals21 Feb 2023US 11,588,456 B2Wisconsin Alumni Research Foundation
- Electromagnetic radiation generation2 Jul 2026US 2026/0188529 A1United Kingdom Atomic Energy Authority
- Slow-wave structure, traveling-wave tube, and communication apparatus29 Jan 2026US 2026/0031297 A1Huawei Technologies Co., Ltd.
- Slow-wave structure, traveling wave tube, electronic device, and communication system27 Nov 2025US 2025/0364201 A1Huawei Technologies Co., Ltd.
- Traveling wave tube26 Oct 2023US 2023/0343542 A1Raytheon Company
- Electroplated helical slow-wave structures for high-frequency signals25 Nov 2021US 2021/0367573 A1Wisconsin Alumni Research Foundation
Most cited
By later US patents
- High voltage power supply particularly adapted for a TWT39US 4,777,406 AVarian Associates, Inc. · 1988
- Gigatron microwave amplifier28US 5,227,701 A1993
- High voltage power supply for a microwave electron tube27US 4,866,344 AVarian Associates, Inc. · 1989
- Travelling-wave tube protection arrangement16US 5,500,621 AMartin Marietta Corporation · 1996
- Traveling-wave tube amplifier having collector potential lower than body potential13US 5,568,014 AKabushiki Kaisha Toshiba · 1996