H01J 29/626
Producing fields exhibiting periodic axial symmetry
Official title: {producing fields exhibiting periodic axial symmetry, e.g. multipolar fields}
H01J29/626 (Producing fields exhibiting periodic axial symmetry) appears on 47 US grants and 3 published applications in this corpus.
Search patents in H01J- Granted patents
- 47
- Published applications
- 3
- Assignees
- 18
- Inventors
- 59
- Latest grant
- 2 Dec 2003
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 7 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Color cathode ray tube2 Dec 2003US 6,657,372 B2Hitachi, Ltd.
- Cathode-ray tube2 Sep 2003US 6,614,157 B2Matsushita Electric Industrial Co., Ltd.
- Color cathode ray tube having a low dynamic focus5 Mar 2002US 6,353,282 B1Hitachi, Ltd.
- Color cathode ray tube having a low dynamic focus voltage18 Dec 2001US 6,331,752 B1Hitachi, Ltd.
- Color cathode ray tube6 Nov 2001US 6,313,576 B1Hitachi Electronic Devices Co., Ltd.
Most cited
By later US patents
- Electron gun for a color cathode ray tube32US 5,300,855 ASamsung Electron Devices Co., Ltd. · 1994
- Electron gun system with dynamic convergence control29US 5,027,043 AZenith Electronics Corporation · 1991
- Color cathode ray tube apparatus24US 4,701,677 AMatsushita Electronics Corporation · 1987
- Color CRT system and process with dynamic quadrupole lens structure24US 5,036,258 AZenith Electronics Corporation · 1991
- CRT Control grid having orthogonal openings on opposite sides22US 4,242,613 AU. S. Philips Corporation · 1980