H01J 29/50
Two or more guns in a single vacuum space
Official title: two or more guns in a single vacuum space, e.g. for plural-ray tube (H01J29/51 takes precedence)
H01J29/50 (Two or more guns in a single vacuum space) appears on 509 US grants and 101 published applications in this corpus.
Search patents in H01J- Granted patents
- 509
- Published applications
- 101
- Assignees
- 77
- Inventors
- 484
- Latest grant
- 4 Dec 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 8 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 11 | 0 |
| 1983 | 12 | 0 |
| 1984 | 10 | 0 |
| 1985 | 16 | 0 |
| 1986 | 17 | 0 |
| 1987 | 19 | 0 |
| 1988 | 17 | 0 |
| 1989 | 18 | 0 |
| 1990 | 16 | 0 |
| 1991 | 17 | 0 |
| 1992 | 11 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 11 | 0 |
| 1996 | 15 | 0 |
| 1997 | 20 | 0 |
| 1998 | 37 | 0 |
| 1999 | 30 | 0 |
| 2000 | 19 | 0 |
| 2001 | 21 | 17 |
| 2002 | 51 | 41 |
| 2003 | 39 | 16 |
| 2004 | 18 | 11 |
| 2005 | 7 | 7 |
| 2006 | 8 | 4 |
| 2007 | 4 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- X-ray tube including hybrid electron emission source4 Dec 2018US 10,147,581 B2Electronics and Telecommunications Research Institute
- X-ray tube16 May 2017US 9,653,248 B2Toshiba Electron Tubes & Devices Co., Ltd.
- Cathode ray tube having an electron gun25 Dec 2007US 7,312,564 B2Thomson Licensing
- In-line type electron gun and color cathode ray tube apparatus using the same11 Dec 2007US 7,307,378 B2Matsushita Toshiba Picture Display Co., Ltd.
- Cathode-ray tube having an electron gun with an improved main focus lens11 Sep 2007US 7,268,477 B2Thomson Licensing
- X-ray tube including hybrid electron emission source27 Jul 2017US 2017/0213685 A1Electronics and Telecommunications Research Institute
- X-ray tube30 Apr 2015US 2015/0117617 A1Kabushiki Kaisha Toshiba
- Cathode ray tube including electron gun2 Jul 2009US 2009/0167143 A1LG. Philips Displays Korea Co., Ltd.
- Electron gun, cathode ray tube, and projector16 Aug 2007US 2007/0188071 A1
- Cathode ray electron gun with an improved beam formation structure22 Mar 2007US 2007/0063631 A1
Most cited
By later US patents
- CRT with field-emission cathode75US 4,178,531 ARCA Corporation · 1979
- Color picture tube having an improved inline electron gun with an expanded focus lens38US 4,370,592 ARCA Corporation · 1983
- Cathode ray tube apparatus having focusing grids with horizontally and vertically oblong through holes35US 4,814,670 AMatsushita Electronics Corporation · 1989
- Cathode ray tube apparatus with quadrupole electrode structure35US 4,886,999 AMitsubishi Denki Kabushiki Kaishi · 1989
- Plural gun cathode ray tube having parallel plates adjacent grid apertures33US 4,086,513 ARCA Corporation · 1978