G11B 5/531
Disposition of more than one recording or reproducing head on support rotating
Official title: {Disposition of more than one recording or reproducing head on support rotating cyclically around an axis}
G11B5/531 (Disposition of more than one recording or reproducing head on support rotating) appears on 379 US grants and 73 published applications in this corpus.
Search patents in G11B- Granted patents
- 379
- Published applications
- 73
- Assignees
- 79
- Inventors
- 574
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 8 | 0 |
| 1986 | 11 | 0 |
| 1987 | 11 | 0 |
| 1988 | 11 | 0 |
| 1989 | 13 | 0 |
| 1990 | 8 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 12 | 0 |
| 1994 | 15 | 0 |
| 1995 | 17 | 0 |
| 1996 | 15 | 0 |
| 1997 | 21 | 0 |
| 1998 | 32 | 0 |
| 1999 | 27 | 0 |
| 2000 | 23 | 0 |
| 2001 | 16 | 9 |
| 2002 | 11 | 9 |
| 2003 | 6 | 3 |
| 2004 | 11 | 15 |
| 2005 | 4 | 10 |
| 2006 | 12 | 2 |
| 2007 | 4 | 5 |
| 2008 | 8 | 1 |
| 2009 | 2 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 3 | 5 |
| 2017 | 3 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 2 | 0 |
| 2021 | 3 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 3 |
| 2024 | 1 | 2 |
| 2025 | 4 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Disk apparatus including flexure having portions of different thicknesses4 Nov 2025US 12,462,835 B2Kabushiki Kaisha Toshiba
- Magnetic tape device and method of operating magnetic tape device29 Jul 2025US 12,374,363 B2FUJIFILM Corporation
- Magnetic tape cartridge, magnetic tape drive, memory, magnetic tape, magnetic tape system, and operation method of magnetic tape drive4 Mar 2025US 12,243,568 B2FUJIFILM Corporation
- Magnetic tape cartridge, magnetic tape drive, memory, magnetic tape, magnetic tape system, and operation method of magnetic tape drive11 Feb 2025US 12,223,987 B2FUJIFILM Corporation
- Recording and reproducing device with medium regulating portion1 Oct 2024US 12,106,775 B2Resonac Corporation
- Disk apparatus27 Mar 2025US 2025/0104734 A1Kabushiki Kaisha Toshiba
- Base plate, spindle motor, disk drive device, and method for manufacturing base plate21 Nov 2024US 2024/0386909 A1Nidec Corporation
- Recording and reproducing device7 Mar 2024US 2024/0079029 A1Resonac Corporation
- Magnetic tape cartridge, magnetic tape drive, memory, magnetic tape, magnetic tape system, and operation method of magnetic tape drive29 Jun 2023US 2023/0206945 A1FUJIFILM Corporation
- Magnetic tape cartridge, magnetic tape drive, memory, magnetic tape, magnetic tape system, and operation method of magnetic tape drive29 Jun 2023US 2023/0206946 A1FUJIFILM Corporation
Most cited
By later US patents
- Waveguide apparatus for coupling a high data rate signal to and from a rotary head scanner203US 4,717,974 AEastman Kodak Company · 1988
- Error prevention in a recording and reproducing device with at least one rotating head60US 5,067,035 AKudelski SA fabrique de'enregistreurs Nagra · 1991
- Ultra small track width thin film magnetic transducer56US 5,189,580 AAmpex Corporation · 1993
- Method and system of reproduction of magnetically recorded video signals at speeds differing from recording speed46US 4,558,376 ARobert Bosch GmbH · 1985
- Method of manufacturing ultra small track width thin film transducers46US 5,016,342 AAmpex Corporation · 1991