G11B 5/556
Control circuits therefor
Official title: {control circuits therefor}
G11B5/556 (Control circuits therefor) appears on 86 US grants and 38 published applications in this corpus.
Search patents in G11B- Granted patents
- 86
- Published applications
- 38
- Assignees
- 32
- Inventors
- 145
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 2 |
| 2004 | 0 | 1 |
| 2005 | 2 | 3 |
| 2006 | 4 | 1 |
| 2007 | 3 | 3 |
| 2008 | 3 | 3 |
| 2009 | 5 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 7 | 1 |
| 2016 | 3 | 0 |
| 2017 | 5 | 2 |
| 2018 | 5 | 2 |
| 2019 | 1 | 1 |
| 2020 | 7 | 5 |
| 2021 | 7 | 2 |
| 2022 | 1 | 2 |
| 2023 | 3 | 2 |
| 2024 | 2 | 2 |
| 2025 | 3 | 3 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Increased VCM current resolution during track follow to decrease NRRO11 Aug 2026US 12,706,116 B2Western Digital Technologies, Inc.
- Voltage slew control of fine actuators in hard disk drive16 Jun 2026US 12,658,207 B1Western Digital Technologies, Inc.
- Data storage device with self-learning oscillation detector6 Jan 2026US 12,518,789 B2Western Digital Technologies, Inc.
- Magnetic disk drive16 Sep 2025US 12,417,783 B1Kabushiki Kaisha Toshiba
- Voltage slew control of fine actuators during discharge2 Sep 2025US 12,406,697 B1Western Digital Technologies, Inc.
- Magnetic disk device and signal synchronization method17 Sep 2026US 2026/0279394 A1Kabushiki Kaisha Toshiba
- Evaluation method, manufacturing method, and disk device23 Apr 2026US 2026/0112390 A1Kabushiki Kaisha Toshiba
- Magnetic disk drive18 Sep 2025US 2025/0292794 A1Kabushiki Kaisha Toshiba
- Data storage device with self-learning oscillation detector22 May 2025US 2025/0166662 A1Western Digital Technologies, Inc.
- Increased vcm current resolution during track follow to decrease nrro17 Apr 2025US 2025/0124950 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Hard disc drive with improved servo system126US 5,262,907 ASeagate Technology LLC · 1993
- Disk drive tuning dual stage actuator servo loop gains from open loop response at target frequency116US 8,254,222 B1Western Digital Technologies, Inc. · 2012
- Detecting fly height of a head over a storage medium64US 7,199,961 B1Marvell International Ltd. · 2007
- Wiring connecting structure for piezoelectric actuator, piezoelectric actuator, and head suspension55US 8,248,734 B2NHK Spring Co., Ltd. · 2012
- Dual-actuator transducer position control apparatus for seeking and following track on rotary disk45US 5,177,652 AHitachi, Ltd. · 1993