H01J 23/42
The interaction circuit being a helix or a helix-derived slow-wave structure
Official title: the interaction circuit being a helix or a helix-derived slow-wave structure (H01J23/44 - H01J23/48 take precedence)
H01J23/42 (The interaction circuit being a helix or a helix-derived slow-wave structure) appears on 9 US grants and 2 published applications in this corpus.
Search patents in H01J- Granted patents
- 9
- Published applications
- 2
- Assignees
- 6
- Inventors
- 19
- Latest grant
- 15 May 2007
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 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 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Electron beam tube output arrangement15 May 2007US 7,218,053 B2E2V Technologies (UK) Limited
- Traveling wave tube system with output waveguide-coupler termination19 Nov 2002US 6,483,242 B1Hughes Electronics Corporation
- Plasma-assisted tube with helical slow-wave structure16 Sep 1997US 5,668,442 AHughes Electronics Corporation
- Vacuum-tight window for microwave electron tube and travelling wave tube including this window2 Apr 1991US 5,004,952 AThomson-CSF
- Travelling wave tube provided with an impervious coupling device between its delay line and an external microwave circuit15 Jan 1991US 4,985,659 AThomson-CSF
Most cited
By later US patents
- Plasma-assisted tube with helical slow-wave structure12US 5,668,442 AHughes Electronics Corporation · 1997
- High efficiency split flow turbine for compressible fluids7US 4,165,949 AGroupe Europeen pour la Technique des Turbines a Vapeur G.E.T.T. · 1979
- Vacuum-tight window for microwave electron tube and travelling wave tube including this window7US 5,004,952 AThomson-CSF · 1991
- Traveling wave tube system with output waveguide-coupler termination7US 6,483,242 B1Hughes Electronics Corporation · 2002
- Travelling wave tube provided with an impervious coupling device between its delay line and an external microwave circuit5US 4,985,659 AThomson-CSF · 1991