G11B 21/08
Track changing or selecting during transducing operation
Official title: Track changing or selecting (G11B21/12 takes precedence){during transducing operation}
G11B21/08 (Track changing or selecting during transducing operation) appears on 1,291 US grants and 183 published applications in this corpus.
Search patents in G11B- Granted patents
- 1,291
- Published applications
- 183
- Assignees
- 239
- Inventors
- 1,861
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 10 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 16 | 0 |
| 1983 | 19 | 0 |
| 1984 | 30 | 0 |
| 1985 | 33 | 0 |
| 1986 | 32 | 0 |
| 1987 | 32 | 0 |
| 1988 | 36 | 0 |
| 1989 | 75 | 0 |
| 1990 | 51 | 0 |
| 1991 | 48 | 0 |
| 1992 | 48 | 0 |
| 1993 | 46 | 0 |
| 1994 | 45 | 0 |
| 1995 | 36 | 0 |
| 1996 | 30 | 0 |
| 1997 | 48 | 0 |
| 1998 | 100 | 0 |
| 1999 | 94 | 0 |
| 2000 | 105 | 0 |
| 2001 | 66 | 28 |
| 2002 | 53 | 37 |
| 2003 | 42 | 19 |
| 2004 | 40 | 20 |
| 2005 | 20 | 11 |
| 2006 | 24 | 9 |
| 2007 | 6 | 6 |
| 2008 | 5 | 4 |
| 2009 | 2 | 0 |
| 2010 | 3 | 0 |
| 2011 | 2 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 5 | 2 |
| 2015 | 1 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 4 | 4 |
| 2019 | 5 | 1 |
| 2020 | 8 | 7 |
| 2021 | 8 | 5 |
| 2022 | 10 | 8 |
| 2023 | 12 | 8 |
| 2024 | 8 | 5 |
| 2025 | 2 | 2 |
| 2026 | 5 | 2 |
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.
- Method of operating hard disk drives, corresponding hard disk drive and processing device25 Aug 2026US 12,718,845 B2STMicroelectronics S,r.l.
- Increased VCM current resolution during track follow to decrease NRRO11 Aug 2026US 12,706,116 B2Western Digital Technologies, Inc.
- Hard disk drives with piezoelectric ultrasonic motor31 Mar 2026US 12,592,252 B2Seagate Technology LLC
- Disk drive arm actuator with piezoelectric ultrasonic motor24 Feb 2026US 12,562,189 B2Seagate Technology LLC
- Control device, disk drive, control method, and storage medium20 Aug 2026US 2026/0245587 A1Kabushiki Kaisha Toshiba
- Disk drive arm actuator with piezoelectric ultrasonic motor1 Jan 2026US 2026/0004807 A1Seagate Technology LLC
- Method of operating hard disk drives, corresponding hard disk drive and processing device30 Oct 2025US 2025/0336419 A1STMicroelectronics S,r.l.
- Increased vcm current resolution during track follow to decrease nrro17 Apr 2025US 2025/0124950 A1Western Digital Technologies, Inc.
- Hard disk drives with piezoelectric ultrasonic motor12 Dec 2024US 2024/0412762 A1Seagate Technology LLC
Most cited
By later US patents
- Sector architecture for fixed block disk drive234US 5,523,903 AInternational Business Machines Corporation · 1996
- 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
- Architecture for 21/2 inch diameter single disk drive185US 5,025,335 AConner Peripherals, Inc. · 1991
- Recording/reproducing compressed data on a rotatable record medium in which at least one intraframe code signal and at least (n-1) interframe code signals are recorded in each track183US 5,140,437 ASony Corporation · 1992