H01J 25/025
With an electron stream following a helical path
Official title: {with an electron stream following a helical path}
H01J25/025 (With an electron stream following a helical path) appears on 82 US grants and 18 published applications in this corpus.
Search patents in H01J- Granted patents
- 82
- Published applications
- 18
- Assignees
- 38
- Inventors
- 108
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 10 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 1 | 4 |
| 2011 | 2 | 1 |
| 2012 | 0 | 1 |
| 2013 | 3 | 0 |
| 2014 | 2 | 2 |
| 2015 | 3 | 0 |
| 2016 | 0 | 1 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power supply device for gyrotron and power control method1 Sep 2026US 12,725,752 B2Kyoto Fusioneering Ltd.
- Hybrid Halbach permanent and electro magnet array for harmonic gyrotrons10 Dec 2024US 12,165,826 B1RCT Systems, Inc.
- Internal load for a travelling wave tube using a folded-waveguide slow-wave structure12 Nov 2019US 10,475,617 B2Thales
- Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide25 Jul 2017US 9,715,988 B2Calabazas Creek Research, Inc.
- Ferroelectric emitter for electron beam emission and radiation generation9 May 2017US 9,646,797 B2Ariel-University Research and Development Company Ltd.
- Power supply device for gyrotron and power control method10 Jul 2025US 2025/0226169 A1Kyoto Fusioneering Ltd.
- Large electron tube, magnetic body, and method for using large electron tube30 Jan 2025US 2025/0037959 A1National Institutes for Quantum Science and Technology
- Internal load for a travelling wave tube using a folded-waveguide slow-wave structure30 May 2019US 2019/0164714 A1Thales
- Gyrotron Whispering Gallery Mode Coupler With Phase Correcting Mirrors and Launcher For Direct Coupling of RF into HE11 Waveguide5 Jan 2017US 2017/0005386 A1Calabazas Creek Research, Inc.
- Ferroelectric emitter for electron beam emission and radiation generation26 May 2016US 2016/0148773 A1Ariel-University Research and Development Company Ltd.
Most cited
By later US patents
- Mode suppression means for gyrotron cavities237US 4,398,121 AVarian Associates, Inc. · 1983
- Wide-band gyrotron traveling-wave amplifier229US 4,533,875 A1985
- Mode suppressors for whispering gallery gyrotron229US 4,851,788 AVarian Associates, Inc. · 1989
- Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide229US 5,015,914 AVarian Associates, Inc. · 1991
- Gyrotron having a quasi-optical mode converter225US 5,187,409 AKabushiki Kaisha Toshiba · 1993