H01J 23/27
Helix-derived slow-wave structures
H01J23/27 (Helix-derived slow-wave structures) appears on 9 US grants and 2 published applications in this corpus.
Search patents in H01J- Granted patents
- 9
- Published applications
- 2
- Assignees
- 10
- Inventors
- 21
- Latest grant
- 8 Aug 1989
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 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 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Crossed double helix slow-wave circuit for use in linear-beam microwave tube8 Aug 1989US 4,855,644 ANEC Corporation
- Delay line for high-performance traveling-wave tubes, in the form of a two part-tungsten and molybdenum-ring ribbon conductor14 Jan 1986US 4,564,788 ASiemens Aktiengesellschaft
- Ring-bar slow wave structure and fabrication method14 Aug 1984US 4,465,987 AHughes Aircraft Company
- Ladder supported ring bar circuit20 Dec 1983US 4,422,012 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Method for the manufacture of a microwave delay line and microwave delay line obtained by this method2 Feb 1982US 4,313,474 AThomson-CSF
- Slow-wave structure, traveling wave tube, electronic device, and communication system27 Nov 2025US 2025/0364201 A1Huawei Technologies Co., Ltd.
- Directed self-assembly of helices via electrodeposition on end-tethered nanomembrane ribbons for millimeter-wave traveling-wave tube amplifiers9 Oct 2025US 2025/0317115 A1UNM Rainforest Innovations
Most cited
By later US patents
- Traveling wave tube and method of making same8US 4,270,069 ASiemens Aktiengesellschaft · 1981
- Slow wave circuit having serially connected contrawound two-turn helices6US 4,004,179 ALitton Systems, Inc. · 1977
- Ring-and-bar slow wave circuits employing ceramic supports at the bars5US 4,093,892 AVarian Associates, Inc. · 1978
- Ladder supported ring bar circuit5US 4,422,012 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1983
- Crossed double helix slow-wave circuit for use in linear-beam microwave tube3US 4,855,644 ANEC Corporation · 1989