G11B 19/20
Driving
Official title: Driving; Starting; Stopping; Control thereof
G11B19/20 (Driving) appears on 4,315 US grants and 2,407 published applications in this corpus.
Search patents in G11B- Granted patents
- 4,315
- Published applications
- 2,407
- Assignees
- 633
- Inventors
- 5,851
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 17 | 0 |
| 1978 | 26 | 0 |
| 1979 | 13 | 0 |
| 1980 | 18 | 0 |
| 1981 | 16 | 0 |
| 1982 | 30 | 0 |
| 1983 | 39 | 0 |
| 1984 | 42 | 0 |
| 1985 | 46 | 0 |
| 1986 | 48 | 0 |
| 1987 | 81 | 0 |
| 1988 | 86 | 0 |
| 1989 | 118 | 0 |
| 1990 | 70 | 0 |
| 1991 | 89 | 0 |
| 1992 | 97 | 0 |
| 1993 | 86 | 0 |
| 1994 | 95 | 0 |
| 1995 | 110 | 0 |
| 1996 | 119 | 0 |
| 1997 | 128 | 0 |
| 1998 | 183 | 0 |
| 1999 | 175 | 0 |
| 2000 | 187 | 0 |
| 2001 | 181 | 73 |
| 2002 | 151 | 234 |
| 2003 | 172 | 199 |
| 2004 | 157 | 205 |
| 2005 | 153 | 200 |
| 2006 | 204 | 177 |
| 2007 | 110 | 131 |
| 2008 | 93 | 130 |
| 2009 | 110 | 101 |
| 2010 | 91 | 98 |
| 2011 | 98 | 102 |
| 2012 | 101 | 100 |
| 2013 | 128 | 157 |
| 2014 | 167 | 153 |
| 2015 | 147 | 92 |
| 2016 | 60 | 50 |
| 2017 | 42 | 23 |
| 2018 | 33 | 21 |
| 2019 | 33 | 38 |
| 2020 | 38 | 22 |
| 2021 | 26 | 11 |
| 2022 | 16 | 14 |
| 2023 | 15 | 24 |
| 2024 | 25 | 30 |
| 2025 | 20 | 12 |
| 2026 | 6 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 19/2009Turntables, hubs and motors for disk drives2,066
- G11B 19/28Speed controlling, regulating, or indicating1,016
- G11B 19/24Arrangements for providing constant relative speed between record carrier and head346
- G11B 19/26Speed-changing arrangements298
- G11B 19/2054Spindle motor power-up sequences95
- G11B 19/22Brakes other than speed-regulating brakes75
- G11B 19/2063Spindle motor power-down sequences73
- G11B 19/209In multiple disk arrays63
Recent patents
- Mitigating oxygen depletion in sealed enclosure heat assisted magnetic recording disk drives28 Apr 2026US 12,614,570 B2Seagate Technology LLC
- Speed control of actuator arm and spindle in a data storage device17 Mar 2026US 12,579,999 B2Western Digital Technologies, Inc.
- Sealed hard disk drive base insert3 Feb 2026US 12,542,154 B2Western Digital Technologies, Inc.
- Grease composition, pivot assembly bearing, and bearing apparatus including the bearing27 Jan 2026US 12,534,680 B2MINEBEA MITSUMI Inc.
- Rolling bearing, pivot assembly bearing, and disk drive apparatus27 Jan 2026US 12,534,681 B2MINEBEA MITSUMI Inc.
- Ultrasonic motor rotary actuator for hard disk drive24 Sep 2026US 2026/0290395 A1Seagate Technology LLC
- Control device, disk drive, control method, and storage medium20 Aug 2026US 2026/0245587 A1Kabushiki Kaisha Toshiba
- Acoustic device13 Aug 2026US 2026/0237404 A1Alphatheta Corporation
- Magnetic disk device having motor16 Jul 2026US 2026/0204285 A1Kabushiki Kaisha Toshiba
- Bearing span reduction with coil thickness increase for improved actuator structural dynamics in hard disk drive23 Apr 2026US 2026/0112389 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Disc reproducing apparatus275US 5,740,143 ASony Corporation · 1998
- Power saving method and apparatus for intermittently reading reproduction apparatus226US 5,822,288 ASony Corporation · 1998
- Optical reproducing method215US 6,549,497 B2Hitachi, Ltd. · 2003
- Parallel drive array storage system210US 4,870,643 AMicropolis Corporation · 1989
- Apparatus and method for noise attenuation in a speech recognition system205US 6,768,979 B1Sony Corporation · 2004