H01J 2229/4886
Polygonal
Official title: polygonal
H01J2229/4886 (Polygonal) appears on 20 US grants and 1 published applications in this corpus.
Search patents in H01J- Granted patents
- 20
- Published applications
- 1
- Assignees
- 11
- Inventors
- 32
- Latest grant
- 4 May 2004
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 0 |
| 2004 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Color cathode ray tube having an improved electron gun4 May 2004US 6,731,056 B2Hitachi Device Engineering Co., Ltd.
- Cathode ray tube with low dynamic correction voltage14 Oct 2003US 6,633,142 B1Hitachi, Ltd.
- Color cathode-ray tube apparatus25 Mar 2003US 6,538,397 B1Kabushiki Kaisha Toshiba
- Color cathode-ray tube having a dynamic focus voltage18 Jun 2002US 6,407,491 B1Hitachi, Ltd.
- Color cathode ray tube having an improved electron gun19 Feb 2002US 6,348,759 B1Hitachi Device Engineering Co., Ltd.
Most cited
By later US patents
- Color display tube with electrostatic focusing lens24US 4,626,738 AU. S. Philips Corporation · 1986
- Cathode ray tube with low dynamic correction voltage20US 5,610,481 AHitachi, Ltd. · 1997
- Cathode ray tube with low dynamic correction voltage12US 6,031,346 AHitachi, Ltd. · 2000
- Electrode gun with grid electrode having contoured apertures10US 6,255,767 B1Orion Electric Co., Ltd. · 2001
- Cathode ray tube with low dynamic correction voltage8US 5,828,191 AHitachi, Ltd. · 1998