G11B 20/225
For reducing wow or flutter
Official title: {for reducing wow or flutter (by controlling the speed of the record carrier G11B15/46, G11B19/28)}
G11B20/225 (For reducing wow or flutter) appears on 92 US grants and 36 published applications in this corpus.
Search patents in G11B- Granted patents
- 92
- Published applications
- 36
- Assignees
- 53
- Inventors
- 142
- Latest grant
- 20 Aug 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 2 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 2 | 6 |
| 2007 | 5 | 1 |
| 2008 | 0 | 8 |
| 2009 | 5 | 3 |
| 2010 | 0 | 4 |
| 2011 | 6 | 5 |
| 2012 | 2 | 2 |
| 2013 | 6 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Audio digitization20 Aug 2019US 10,388,306 B2Blackmagic Design Pty Ltd
- Semiconductor device, write strategy generating method, and write strategy generating program25 Mar 2014US 8,681,591 B2Renesas Electronics Corporation
- Adjusting method for recording condition and optical disc device10 Sep 2013US 8,531,932 B2Hitachi Consumer Electronics Co., Ltd.
- Audio clocking in video applications16 Jul 2013US 8,487,797 B2Magnum Semiconductor, Inc.
- Signal receiving apparatus and signal transmitting system14 May 2013US 8,442,177 B2Mitsubishi Electric Corporation
- Audio digitization11 Oct 2018US 2018/0294002 A1Blackmagic Design Pty Ltd
- Semiconductor Device, Write Strategy Generating Method, and Write Strategy Generating Program6 Sep 2012US 2012/0224466 A1Renesas Electronics Corporation
- Adjusting Method For Recording Condition And Optical Disc Device5 Jan 2012US 2012/0002527 A1Hitachi Consumer Electronics Co., Ltd.
- Disc apparatus29 Sep 2011US 2011/0235483 A1Sanyo Electric Co., Ltd.
- Signal evaluation method and signal evaluation apparatus23 Jun 2011US 2011/0149704 A1Panasonic Corporation
Most cited
By later US patents
- Method and apparatus for reading and writing audio and digital data on a magnetic tape80US 5,619,383 AGemstar Development Corporation · 1997
- Signal delay device72US 5,039,893 AYamaha Corporation · 1991
- Disk drive data synchronizer with window shift synthesis65US 5,212,601 AWestern Digital Corporation · 1993
- Recording system having head transducers with controlled skew58US 4,975,791 ACarlisle Memory Products Group Incorporated · 1990
- Storage medium and apparatus and method for recovering information from such medium by oversampling51US 5,544,140 ADolby Laboratories Licensing Corporation · 1996