G11B 23/033
For flexible discs
Official title: for flexible discs
G11B23/033 (For flexible discs) appears on 298 US grants and 26 published applications in this corpus.
Search patents in G11B- Granted patents
- 298
- Published applications
- 26
- Assignees
- 72
- Inventors
- 385
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 10 | 0 |
| 1982 | 1 | 0 |
| 1983 | 15 | 0 |
| 1984 | 13 | 0 |
| 1985 | 17 | 0 |
| 1986 | 26 | 0 |
| 1987 | 36 | 0 |
| 1988 | 25 | 0 |
| 1989 | 23 | 0 |
| 1990 | 13 | 0 |
| 1991 | 11 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 3 |
| 2002 | 6 | 2 |
| 2003 | 4 | 5 |
| 2004 | 1 | 7 |
| 2005 | 0 | 0 |
| 2006 | 4 | 7 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Servo reproduction apparatus, servo reproduction head, reproduction head, and method of producing a magnetic tape24 Feb 2026US 12,562,188 B2Sony Group Corporation
- Recording disk cartridge having a plurality of flexible recording disk media12 Jan 2010US 7,646,563 B2FUJIFILM Corporation
- Data storage cartridge having baffles12 Feb 2008US 7,331,056 B2Storage Technology Corporation
- Disk cartridge including multiple flexible disks, plural partitioning plates, and a shutter23 Oct 2007US 7,286,323 B2FUJIFILM Corporation
- Magnetic disc medium19 Sep 2006US 7,108,903 B2Fuji Photo Film Co., Ltd.
- Servo reproduction apparatus, servo reproduction head, reproduction head, and method of producing a magnetic tape21 Nov 2024US 2024/0386911 A1Sony Group Corporation
- Photosensitive recording medium cartridge26 Jul 2007US 2007/0174858 A1FUJIFILM Corporation
- Optical disc drive and optical disc cassette20 Apr 2006US 2006/0085810 A1
- Recording disk cartridge13 Apr 2006US 2006/0080696 A1Fuji Photo Film Co., Ltd.
- Recording disk cartridge9 Mar 2006US 2006/0050435 A1Fuji Photo Film Co., Ltd.
Most cited
By later US patents
- Flexible magnetic disk cassette84US 4,445,157 ASony Corporation · 1984
- Magnetic recording disk cartridge61US 4,608,617 AFuji Photo Film Co., Ltd. · 1986
- Flexible magnetic disk cassette and a recording and/or reproducing apparatus for the same52US 4,445,155 ASony Corporation · 1984
- Large-capacity flexible disk and high-density type disk drive used therefor51US 5,940,255 AMitsumi Electric Co., Ltd. · 1999
- Cartridge and flexible magnetic disk assembly48US 4,149,207 AInternational Business Machines Corporation · 1979