H01J 25/42
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 with a magnet system producing an H-field crossing the E-field (with travelling wave moving completely around the electron space H01J25/50)
H01J25/42 (Tubes in which an electron stream interacts with a wave travelling along) appears on 47 US grants and 22 published applications in this corpus.
Search patents in H01J- Granted patents
- 47
- Published applications
- 22
- Assignees
- 25
- Inventors
- 88
- Latest grant
- 26 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 4 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 1 |
| 2015 | 3 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2021 | 2 | 3 |
| 2022 | 0 | 3 |
| 2023 | 2 | 0 |
| 2024 | 3 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Travelling-wave tube26 Nov 2024US 12,154,749 B2Thales
- Methods of making a self-assembled slow-wave structures17 Sep 2024US 12,091,746 B2The Regents of the University of New Mexico
- Electron gun21 May 2024US 11,990,307 B2Thales Deutschland GmbH Electron Devices
- Cathode-in-cathode high-power microwave (HPM) vacuum tube source and method of alignment24 Oct 2023US 11,798,769 B1Raytheon Company
- Microwave tube and method for controlling the same24 Oct 2023US 11,798,770 B2NEC Network and Sensor Systems, Ltd.
- Observation unit, traveling wave tube unit, microwave tube unit, and observation method11 Jun 2026US 2026/0162922 A1NEC Network and Sensor Systems, Ltd.
- Microwave tube and method for controlling the same15 Dec 2022US 2022/0399178 A1NEC Network and Sensor Systems, Ltd.
- Travelling-wave tube4 Aug 2022US 2022/0246381 A1Thales
- Self-assembled helical slow-wave structures for high-frequency signals10 Feb 2022US 2022/0044904 A1The Regents of the University of New Mexico
- Electron gun11 Nov 2021US 2021/0350995 A1Thales Deutschland GmbH Electron Devices
Most cited
By later US patents
- Free-standing diamond structures and methods11US 7,037,370 B22006
- Method of micro-fabrication of a helical slow wave structure using photo-resist processes10US 7,504,039 B2InnoSys, Inc. · 2009
- Broadband, inverted slot mode, coupled cavity circuit8US 6,593,695 B2Northrop Grumman Corporation · 2003
- Cascade crossed field device6US 3,982,152 ARaytheon Company · 1976
- Backward wave oscillator tube utilizing successive delay line sections for increased power6US 4,263,566 AThomson-CSF · 1981