G11B 21/20
While the head is in operative position but stationary or permitting minor
Official title: while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
G11B21/20 (While the head is in operative position but stationary or permitting minor) appears on 599 US grants and 224 published applications in this corpus.
Search patents in G11B- Granted patents
- 599
- Published applications
- 224
- Assignees
- 122
- Inventors
- 959
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 9 | 0 |
| 1983 | 4 | 0 |
| 1984 | 9 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 11 | 0 |
| 1993 | 8 | 0 |
| 1994 | 21 | 0 |
| 1995 | 18 | 0 |
| 1996 | 16 | 0 |
| 1997 | 18 | 0 |
| 1998 | 50 | 0 |
| 1999 | 33 | 0 |
| 2000 | 40 | 0 |
| 2001 | 46 | 18 |
| 2002 | 46 | 58 |
| 2003 | 32 | 31 |
| 2004 | 44 | 16 |
| 2005 | 27 | 20 |
| 2006 | 25 | 15 |
| 2007 | 22 | 10 |
| 2008 | 5 | 5 |
| 2009 | 7 | 3 |
| 2010 | 8 | 1 |
| 2011 | 1 | 1 |
| 2012 | 2 | 2 |
| 2013 | 2 | 5 |
| 2014 | 8 | 7 |
| 2015 | 11 | 3 |
| 2016 | 2 | 1 |
| 2017 | 4 | 4 |
| 2018 | 4 | 1 |
| 2019 | 2 | 6 |
| 2020 | 7 | 4 |
| 2021 | 2 | 2 |
| 2022 | 3 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 3 |
| 2025 | 3 | 5 |
| 2026 | 5 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Die set for forming a work having a pair of flange bending parts2 Jun 2026US 12,646,529 B2NHK Spring Co., Ltd.
- Wiring circuit board26 May 2026US 12,641,719 B2Nitto Denko Corporation
- Processing method for forming a work having a pair of flange bending parts28 Apr 2026US 12,614,562 B2NHK Spring Co., Ltd.
- Wiring circuit board7 Apr 2026US 12,598,698 B2Nitto Denko Corporation
- Magnetic disk device and method of controlling the same6 Jan 2026US 12,518,792 B2Kabushiki Kaisha Toshiba
- Printed circuit board and method of manufacturing same9 Oct 2025US 2025/0318046 A1Nitto Denko Corporation
- Magnetic disk device and method of controlling the same18 Sep 2025US 2025/0292798 A1Kabushiki Kaisha Toshiba
- Die set for forming a work having a pair of flange bending parts15 May 2025US 2025/0157485 A1NHK Spring Co., Ltd.
- Processing method for forming a work having a pair of flange bending parts15 May 2025US 2025/0157486 A1NHK Spring Co., Ltd.
- Magnetic disk device and control method of the same20 Mar 2025US 2025/0095681 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Fly height servo control of read/write head suspension180US 5,377,058 AInternational Business Machines Corporation · 1994
- Disk drive employing method of monitoring transducer flying height to retire defective data site on recording surface174US 6,411,458 B1Western Digital Technologies, Inc. · 2002
- Disk drive having a write condition detector for suspending write operations while a transducer flying height deviates from its operating flying height167US 6,249,393 B1Western Digital Corporation · 2001
- Method for defining a touch-down power for head having a flying height actuator167US 7,440,220 B1Western Digital (Fremont), LLC · 2008
- Read/write head including displacement generating means that elongates and contracts by inverse piezoelectric effect of electrostrictive effect140US 6,246,552 B1TDK Corporation · 2001