H01J 31/121
Tubes for oscillography
Official title: {tubes for oscillography (colour display tubes H01J31/20; cathode ray oscillography G01R13/20)}
H01J31/121 (Tubes for oscillography) appears on 5 US grants and 0 published applications in this corpus.
Search patents in H01J- Granted patents
- 5
- Published applications
- 0
- Assignees
- 3
- Inventors
- 7
- Latest grant
- 27 Jan 1998
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- High frequency scan converter27 Jan 1998US 5,712,537 AReal Time Electronics, Corporation
- Cathode ray tube having an electron gun constructed for ready refocusing of the electron beam22 Nov 1988US 4,786,845 AIwatsu Electric Co., Ltd.
- Postacceleration cathode ray tube with an electron lens system for deflection amplification30 Sep 1986US 4,614,895 AIwatsu Electric Co., Ltd.
- Box-shaped scan expansion lens for cathode ray tube27 Feb 1979US 4,142,128 ATektronix, Inc.
- Dual beam CRT with inner gun and outer gun shield means for correcting keystone distortion28 Sep 1976US 3,983,444 ATektronix, Inc.
No published applications in this class yet.
Most cited
By later US patents
- Box-shaped scan expansion lens for cathode ray tube9US 4,142,128 ATektronix, Inc. · 1979
- Cathode ray tube having an electron gun constructed for ready refocusing of the electron beam6US 4,786,845 AIwatsu Electric Co., Ltd. · 1988
- Dual beam CRT with inner gun and outer gun shield means for correcting keystone distortion4US 3,983,444 ATektronix, Inc. · 1976
- Postacceleration cathode ray tube with an electron lens system for deflection amplification2US 4,614,895 AIwatsu Electric Co., Ltd. · 1986