G11B 21/02
Driving or moving of heads
G11B21/02 (Driving or moving of heads) appears on 2,866 US grants and 831 published applications in this corpus.
Search patents in G11B- Granted patents
- 2,866
- Published applications
- 831
- Assignees
- 418
- Inventors
- 3,916
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 10 | 0 |
| 1979 | 16 | 0 |
| 1980 | 18 | 0 |
| 1981 | 26 | 0 |
| 1982 | 42 | 0 |
| 1983 | 55 | 0 |
| 1984 | 63 | 0 |
| 1985 | 70 | 0 |
| 1986 | 67 | 0 |
| 1987 | 69 | 0 |
| 1988 | 69 | 0 |
| 1989 | 118 | 0 |
| 1990 | 67 | 0 |
| 1991 | 65 | 0 |
| 1992 | 60 | 0 |
| 1993 | 62 | 0 |
| 1994 | 66 | 0 |
| 1995 | 59 | 0 |
| 1996 | 65 | 0 |
| 1997 | 81 | 0 |
| 1998 | 168 | 0 |
| 1999 | 166 | 0 |
| 2000 | 191 | 0 |
| 2001 | 148 | 70 |
| 2002 | 113 | 95 |
| 2003 | 98 | 55 |
| 2004 | 110 | 70 |
| 2005 | 64 | 63 |
| 2006 | 85 | 47 |
| 2007 | 51 | 65 |
| 2008 | 45 | 34 |
| 2009 | 38 | 21 |
| 2010 | 34 | 29 |
| 2011 | 24 | 20 |
| 2012 | 21 | 13 |
| 2013 | 21 | 22 |
| 2014 | 42 | 25 |
| 2015 | 29 | 5 |
| 2016 | 18 | 7 |
| 2017 | 11 | 7 |
| 2018 | 21 | 9 |
| 2019 | 18 | 10 |
| 2020 | 27 | 14 |
| 2021 | 20 | 13 |
| 2022 | 29 | 28 |
| 2023 | 36 | 42 |
| 2024 | 34 | 28 |
| 2025 | 22 | 23 |
| 2026 | 23 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 21/08Track changing or selecting during transducing operation1,291
- G11B 21/10Track finding or aligning by moving the head785
- G11B 21/12Raising and lowering586
- G11B 21/022Programmed access in sequence to indexed parts of operating record carriers113
- G11B 21/04Automatic feed mechanism producing a progressive transducing traverse of the head in105
- G11B 21/03For correcting time base error during transducing operation, by driving or moving38
Recent patents
- Multi-access data storage device with equalization of data rate29 Sep 2026US 12,749,507 B1Western Digital Technologies, Inc.
- Magnetic recording tape medium with conductive particle configuration and cartridge8 Sep 2026US 12,731,609 B2Sony Group Corporation
- Method of operating hard disk drives, corresponding hard disk drive and processing device25 Aug 2026US 12,718,845 B2STMicroelectronics S,r.l.
- Magnetic disk device having piezoelectric element18 Aug 2026US 12,711,986 B2Kabushiki Kaisha Toshiba
- Data storage device with asynchronous position error signal demodulation with split burst servo patterns18 Aug 2026US 12,711,990 B2Western Digital Technologies, Inc.
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus27 Aug 2026US 2026/0253611 A1FUJIFILM Corporation
- Control device, disk drive, control method, and storage medium20 Aug 2026US 2026/0245587 A1Kabushiki Kaisha Toshiba
- Magnetic recording medium13 Aug 2026US 2026/0237402 A1Sony Group Corporation
- Magnetic recording medium and cartridge30 Jul 2026US 2026/0221156 A1Sony Group Corporation
- Magnetic recording medium and cartridge30 Jul 2026US 2026/0221157 A1Sony Group Corporation
Most cited
By later US patents
- Sector architecture for fixed block disk drive234US 5,523,903 AInternational Business Machines Corporation · 1996
- Slider with temperature responsive transducer positioning229US 5,991,113 ASeagate Technology LLC · 1999
- Head positioning control system for use in a disk drive using different target velocity data for read and write seeks222US 6,002,544 AKabushiki Kaisha Toshiba · 1999
- Disk drive apparatus using dynamic loading/unloading217US 4,933,785 APrairietek Corporation · 1990
- Method and apparatus for fingerprinting magnetic media206US 5,365,586 AWashington University · 1994