G11B 7/0906
Differential phase difference systems
Official title: {Differential phase difference systems}
G11B7/0906 (Differential phase difference systems) appears on 177 US grants and 192 published applications in this corpus.
Search patents in G11B- Granted patents
- 177
- Published applications
- 192
- Assignees
- 70
- Inventors
- 358
- Latest grant
- 21 Jul 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 11 |
| 2003 | 9 | 14 |
| 2004 | 10 | 24 |
| 2005 | 10 | 17 |
| 2006 | 13 | 21 |
| 2007 | 24 | 25 |
| 2008 | 10 | 30 |
| 2009 | 15 | 11 |
| 2010 | 16 | 12 |
| 2011 | 14 | 17 |
| 2012 | 12 | 2 |
| 2013 | 10 | 6 |
| 2014 | 7 | 0 |
| 2015 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Optical recording medium drive device, tracking error detection method21 Jul 2015US 9,087,524 B2Sony Corporation
- Single beam radial tracking method for optical discs25 Nov 2014US 8,897,108 B1Marvell International Ltd.
- Optical storage system having differential phase detector4 Nov 2014US 8,879,372 B1Marvell International Ltd.
- Optical drive device9 Sep 2014US 8,830,803 B2TDK Corporation
- Compatible optical recording medium8 Apr 2014US 8,693,302 B2Thomson Licensing
- Optical recording medium drive device, tracking error detection method21 May 2015US 2015/0138941 A1Sony Corporation
- Optical pickup device, optical information recording device, optical information recording method, and optical information recording medium26 Dec 2013US 2013/0343172 A1Hitachi Media Electronics Co., Ltd.
- Optical recording medium driving apparatus and cross track signal generation method12 Sep 2013US 2013/0235713 A1Sony Corporation
- Storage medium, reproducing method, and recording method22 Aug 2013US 2013/0215729 A1Kabushiki Kaisha Toshiba
- Optical Pickup11 Jul 2013US 2013/0176840 A1Hitachi Media Electronics Co., Ltd.
Most cited
By later US patents
- Optical disk having a rewritable area and a read-only area107US 5,850,382 AMatsushita Electrical Industrial Co., Ltd. · 1998
- Signal detection system for use in an optically reproducing apparatus43US 4,467,462 AOlympus Optical Co., Ltd. · 1984
- Tracking error signal generating device for preventing offset of the generated tracking error signal42US 5,258,968 APioneer Electronic Corporation · 1993
- Optical recording and reproducing methods for optical disk42US 6,487,149 B1Ricoh Company, Ltd. · 2002
- Error signal detection apparatus and reproduction signal detection apparatus for optical recording/reproducing system and method therefor41US 6,507,544 B1Samsung Electronics Co., Ltd. · 2003