H01J 35/06
Cathodes
H01J35/06 (Cathodes) appears on 812 US grants and 822 published applications in this corpus.
Search patents in H01J- Granted patents
- 812
- Published applications
- 822
- Assignees
- 288
- Inventors
- 1,351
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 4 | 0 |
| 1995 | 8 | 0 |
| 1996 | 9 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 6 |
| 2002 | 14 | 12 |
| 2003 | 10 | 11 |
| 2004 | 7 | 14 |
| 2005 | 7 | 21 |
| 2006 | 20 | 21 |
| 2007 | 18 | 27 |
| 2008 | 13 | 14 |
| 2009 | 17 | 35 |
| 2010 | 29 | 39 |
| 2011 | 24 | 40 |
| 2012 | 25 | 28 |
| 2013 | 24 | 22 |
| 2014 | 18 | 33 |
| 2015 | 29 | 45 |
| 2016 | 35 | 46 |
| 2017 | 43 | 58 |
| 2018 | 47 | 43 |
| 2019 | 46 | 44 |
| 2020 | 64 | 51 |
| 2021 | 44 | 40 |
| 2022 | 32 | 35 |
| 2023 | 28 | 31 |
| 2024 | 35 | 38 |
| 2025 | 40 | 46 |
| 2026 | 25 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and arrangement for an X-ray source29 Sep 2026US 12,750,938 B2Excillum AB
- X-ray tube22 Sep 2026US 12,744,177 B2Hamamatsu Photonics K.K.
- X-ray tube with stable electron beam15 Sep 2026US 12,738,440 B2Moxtek, Inc.
- Field effect electron emitter with grouped part emission surfaces11 Aug 2026US 12,706,269 B2Siemens Healthineers AG
- X-ray generation apparatus and X-ray imaging apparatus4 Aug 2026US 12,701,647 B2Canon Anelva Corporation
- X-ray devices with nanotube emitters and methods of forming8 Oct 2026US 2026/0311951 A1Varex Imaging Corporation
- Planar filament with focused, central electron emission24 Sep 2026US 2026/0290737 A1Moxtek, Inc.
- X-ray tubes, enclosures for x-ray tubes, and methods of manufacture24 Sep 2026US 2026/0290739 A1Varex Imaging Corporation
- Air tolerant photocathode electron gun17 Sep 2026US 2026/0276961 A1Nova Measuring Instruments Ltd.
- Electron beam emission structure and field emission device3 Sep 2026US 2026/0260836 A1Meidensha Corporation
Most cited
By later US patents
- X-ray source with shaped radiation pattern254US 5,422,926 APhotoelectron Corporation · 1995
- X-ray generating mechanism using electron field emission cathode190US 6,553,096 B1University of North Carolina - Chapel Hill · 2003
- Miniature x-ray source178US 5,729,583 AThe United States of America as represented by the Secretary of Commerce · 1998
- X-ray tube electron beam formation and focusing173US 5,633,907 AGeneral Electric Company · 1997
- X-ray source with flexible probe153US 5,428,658 APhotoelectron Corporation · 1995