G11B 23/08792
Shielding devices
Official title: {Shielding devices}
G11B23/08792 (Shielding devices) appears on 9 US grants and 0 published applications in this corpus.
Search patents in G11B- Granted patents
- 9
- Published applications
- 0
- Assignees
- 5
- Inventors
- 16
- Latest grant
- 1 Oct 1996
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of assembling a tape cassette and securing a plate spring and shield plate therein1 Oct 1996US 5,561,573 AFuji Photo Film Co., Ltd.
- Tape cartridge with an arrangement of a magnetic shielding plate5 Apr 1988US 4,735,378 AHitachi Maxell, Ltd.
- Tape cartridge15 Mar 1988US 4,731,687 AHitachi Maxell, Ltd.
- Magnetic tape cassette26 May 1987US 4,669,018 AFuji Photo Film Co., Ltd.
- Magnetic tape cassette having improved magnetic shielding18 Feb 1986US 4,571,654 AFuji Photo Film Co., Ltd.
No published applications in this class yet.
Most cited
By later US patents
- Magnetic recording tape cartridge7US 4,337,493 AHitachi Maxell, Ltd. · 1982
- Magnetic tape cassette with screening shield6US 4,011,593 ABASF SE · 1977
- Magnetic tape cassette having improved magnetic shielding5US 4,571,654 AFuji Photo Film Co., Ltd. · 1986
- Method of assembling a tape cassette and securing a plate spring and shield plate therein5US 5,561,573 AFuji Photo Film Co., Ltd. · 1996
- Magnetic shielding spring4US 4,392,169 AU. S. Philips Corporation · 1983