H01J 29/622
Producing fields exhibiting symmetry of revolution
Official title: {producing fields exhibiting symmetry of revolution}
H01J29/622 (Producing fields exhibiting symmetry of revolution) appears on 64 US grants and 5 published applications in this corpus.
Search patents in H01J- Granted patents
- 64
- Published applications
- 5
- Assignees
- 25
- Inventors
- 104
- Latest grant
- 11 Sep 2007
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 6 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 3 |
| 2007 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Cathode-ray tube having an electron gun with an improved main focus lens11 Sep 2007US 7,268,477 B2Thomson Licensing
- Cathode-ray tube17 Jan 2006US 6,987,367 B2Kabushiki Kaisha Toshiba
- Electron gun for color cathode ray tube15 Jun 2004US 6,750,601 B2LG. Philips Displays Korea Co., Ltd.
- Lens aperture structure for diminishing focal aberrations in an electron gun17 Sep 2002US 6,452,320 B1Orion Electric Co., Ltd.
- Electron gun with electron beam converging member disposed between quadrupole and main lens and a cathode ray tube employing the same17 Jul 2001US 6,262,524 B1Sony Corporation
- Method and structure of converging electron-emission source of field-emission display29 Jun 2006US 2006/0138927 A1Teco Nanotech Co., Ltd.
- Cathode-ray tube having an electron gun with an improved main focus lens16 Mar 2006US 2006/0055306 A1Thomson Licensing
- Method and structure of converging electron-emission source of field-emission display9 Mar 2006US 2006/0049736 A1
- Cathode-ray tube16 Dec 2004US 2004/0251836 A1Kabushiki Kaisha Toshiba
- Electron gun for color cathode ray tube19 Jun 2003US 2003/0111952 A1LG. Philips Displays Korea Co., Ltd.
Most cited
By later US patents
- Electron gun for a cathode ray tube26US 5,773,925 ASony Corporation · 1998
- Color cathode ray tube apparatus16US 5,449,983 AKabushiki Kaisha Toshiba · 1995
- Unitized electron gun having electrodes with internal beam-shielding tubes15US 4,119,884 AZenith Radio Corporation · 1978
- Electron gun having a distributed electrostatic lens13US 4,124,810 ARCA Corporation · 1978
- Cathode-ray tube having electron gun with three focus lenses13US 4,528,476 ARCA Corporation · 1985