H01J 2229/50
Plurality of guns or beams
H01J2229/50 (Plurality of guns or beams) appears on 34 US grants and 7 published applications in this corpus.
Search patents in H01J- Granted patents
- 34
- Published applications
- 7
- Assignees
- 23
- Inventors
- 42
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 2 |
| 2003 | 1 | 1 |
| 2004 | 2 | 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 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Extreme-ultraviolet light source device using electron beams21 Oct 2025US 12,451,316 B2Worldbeam Solution Co., Ltd.
- X-ray tube16 May 2017US 9,653,248 B2Toshiba Electron Tubes & Devices Co., Ltd.
- Structure of electron gun for color cathode ray tube21 Dec 2004US 6,833,680 B2LG. Philips Displays Korea Co., Ltd.
- Method and apparatus for assembling electron gun20 Jan 2004US 6,679,744 B2Sony Corporation
- Electron gun assembly and cathode ray tube apparatus25 Nov 2003US 6,653,771 B2Kabushiki Kaisha Toshiba
- Processor System, Correction Method, and Correction Program4 Jul 2024US 2024/0222064 A1Hitachi High-Tech Corporation
- Extreme-ultraviolet light source device using electron beams20 Apr 2023US 2023/0122253 A1University-Industry Cooperation Group of Kyung Hee University
- X-ray tube30 Apr 2015US 2015/0117617 A1Kabushiki Kaisha Toshiba
- Structure of electron gun for color cathode ray tube28 Aug 2003US 2003/0160566 A1LG. Philips Displays Korea Co., Ltd.
- Electron gun assembly and cathode ray tube27 Jun 2002US 2002/0079817 A1
Most cited
By later US patents
- CRT with field-emission cathode75US 4,178,531 ARCA Corporation · 1979
- Ribbon beam cathode ray tube19US 5,130,614 AMassachusetts Institute of Technology · 1992
- Multi-mode, hybrid-type CRT and electron gun therefor with selectable different sized grid apertures18US 5,483,128 AChunghwa Picture Tubes, Ltd. · 1996
- Multi-mode, hybrid-type CRT and electron gun therefor with selectable different sized grid apertures16US 5,689,158 AChunghwa Picture Tubes, Ltd. · 1997
- Multi-beam group electron gun for color CRT15US 5,350,978 AChunghwa Picture Tubes, Ltd. · 1994