H01J 23/26
Helical slow-wave structures
Official title: Helical slow-wave structures; Adjustment therefor
H01J23/26 (Helical slow-wave structures) appears on 80 US grants and 19 published applications in this corpus.
Search patents in H01J- Granted patents
- 80
- Published applications
- 19
- Assignees
- 38
- Inventors
- 109
- Latest grant
- 13 Aug 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 6 |
| 2013 | 1 | 0 |
| 2014 | 5 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 2 |
| 2020 | 0 | 2 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Slow-wave circuit, traveling wave tube, and method for manufacturing traveling wave tube13 Aug 2024US 12,062,517 B2NEC Network and Sensor Systems, Ltd.
- Electroplated helical slow-wave structures for high-frequency signals21 Feb 2023US 11,588,456 B2Wisconsin Alumni Research Foundation
- Microwave amplification device including a microwave electron tube having a getter that can be controlled8 Mar 2022US 11,270,863 B2NEC Network and Sensor Systems, Ltd.
- High-frequency vacuum electronic device26 Jan 2021US 10,903,035 B2Wisconsin Alumni Research Foundation
- Internal load for a travelling wave tube using a folded-waveguide slow-wave structure12 Nov 2019US 10,475,617 B2Thales
- 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.
- 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
- Travelling-Wave Tube, Electron Gun, and Power Amplification System27 Feb 2025US 2025/0070736 A1Huawei Technologies Co., Ltd.
- Electroplated helical slow-wave structures for high-frequency signals25 Nov 2021US 2021/0367573 A1Wisconsin Alumni Research Foundation
Most cited
By later US patents
- Diamond brazing method for slow wave energy propagating structures31US 3,949,263 ARaytheon Company · 1976
- Slow-wave structure having block supported helix structure26US 5,173,669 AHughes Aircraft Company · 1992
- Helical slow-wave structure assemblies and fabrication methods25US 4,229,676 AHughes Aircraft Company · 1980
- Traveling wave deflector for electron beams22US 4,093,891 ATektronix, Inc. · 1978
- Method of joining concentric cylinders21US 4,746,054 ANorthrop Corporation · 1988