G11B 21/00
Head arrangements not specific to the method of recording or reproducing
G11B21/00 (Head arrangements not specific to the method of recording or reproducing) appears on 4,127 US grants and 1,291 published applications in this corpus.
Search patents in G11B- Granted patents
- 4,127
- Published applications
- 1,291
- Assignees
- 531
- Inventors
- 5,416
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 5 | 0 |
| 1978 | 12 | 0 |
| 1979 | 19 | 0 |
| 1980 | 25 | 0 |
| 1981 | 30 | 0 |
| 1982 | 58 | 0 |
| 1983 | 64 | 0 |
| 1984 | 77 | 0 |
| 1985 | 86 | 0 |
| 1986 | 80 | 0 |
| 1987 | 82 | 0 |
| 1988 | 80 | 0 |
| 1989 | 131 | 0 |
| 1990 | 87 | 0 |
| 1991 | 89 | 0 |
| 1992 | 82 | 0 |
| 1993 | 85 | 0 |
| 1994 | 101 | 0 |
| 1995 | 86 | 0 |
| 1996 | 100 | 0 |
| 1997 | 117 | 0 |
| 1998 | 266 | 0 |
| 1999 | 235 | 0 |
| 2000 | 289 | 0 |
| 2001 | 245 | 110 |
| 2002 | 193 | 172 |
| 2003 | 156 | 98 |
| 2004 | 182 | 105 |
| 2005 | 104 | 99 |
| 2006 | 124 | 79 |
| 2007 | 79 | 91 |
| 2008 | 64 | 57 |
| 2009 | 61 | 41 |
| 2010 | 62 | 42 |
| 2011 | 34 | 30 |
| 2012 | 41 | 18 |
| 2013 | 29 | 35 |
| 2014 | 60 | 41 |
| 2015 | 52 | 13 |
| 2016 | 28 | 11 |
| 2017 | 19 | 13 |
| 2018 | 28 | 12 |
| 2019 | 22 | 20 |
| 2020 | 38 | 21 |
| 2021 | 30 | 18 |
| 2022 | 38 | 36 |
| 2023 | 43 | 47 |
| 2024 | 36 | 34 |
| 2025 | 28 | 31 |
| 2026 | 33 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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.
- Ramp pad spacer for a hard disk drive17 Sep 2026US 2026/0279398 A1Western 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
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