G11B 7/0909
By astigmatic methods
Official title: {by astigmatic methods}
G11B7/0909 (By astigmatic methods) appears on 388 US grants and 174 published applications in this corpus.
Search patents in G11B- Granted patents
- 388
- Published applications
- 174
- Assignees
- 112
- Inventors
- 656
- Latest grant
- 7 Mar 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 10 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 14 | 0 |
| 1989 | 21 | 0 |
| 1990 | 11 | 0 |
| 1991 | 10 | 0 |
| 1992 | 15 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 11 | 0 |
| 1996 | 12 | 0 |
| 1997 | 14 | 0 |
| 1998 | 22 | 0 |
| 1999 | 19 | 0 |
| 2000 | 13 | 0 |
| 2001 | 15 | 8 |
| 2002 | 17 | 21 |
| 2003 | 10 | 15 |
| 2004 | 14 | 14 |
| 2005 | 13 | 13 |
| 2006 | 11 | 15 |
| 2007 | 10 | 17 |
| 2008 | 9 | 21 |
| 2009 | 7 | 18 |
| 2010 | 11 | 11 |
| 2011 | 20 | 8 |
| 2012 | 11 | 4 |
| 2013 | 8 | 5 |
| 2014 | 2 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Diffractive optical element, projection device and measuring device7 Mar 2023US 11,598,972 B2AGC Inc.
- Recording/reproducing apparatus6 Jun 2017US 9,672,860 B2Kabushiki Kaisha Toshiba
- Optical pickup device1 Sep 2015US 9,123,357 B2Funai Electronic Co., Ltd.
- Optical disc device and focus jump method14 Jul 2015US 9,082,429 B2Funai Electric Co., Ltd.
- Optical pickup device and optical disc apparatus for recording and reproducing information on and from optical disc including plurality of recording layers27 May 2014US 8,737,180 B2Hitachi Media Electronics Co., Ltd.
- Diffractive optical element, projection device and measuring device9 Apr 2020US 2020/0110277 A1AGC Inc.
- Recording/reproducing apparatus16 Jun 2016US 2016/0171997 A1Kabushiki Kaisha Toshiba
- Optical Disc Device and Focus Jump Method22 Jan 2015US 2015/0023143 A1Funai Electric Co., Ltd.
- Optical pickup device18 Dec 2014US 2014/0369175 A1Funai Electric Co., Ltd.
- Optical pickup device and optical disc apparatus for recording and reproducing information on and from optical disc plurality of recording layers5 Sep 2013US 2013/0229898 A1Hitachi Media Electronics Co., Ltd.
Most cited
By later US patents
- Compound objective lens having two focal points144US 5,446,565 AMatsushita Electric Industrial Co., Ltd. · 1995
- Optical pickup with conversion of diffusion angle of outgoing light relative to diffusion angle of incident light120US 5,790,502 AMatsushita Electric Industrial Co., Ltd. · 1998
- Optical head and information recording apparatus71US 5,361,244 AHitachi, Ltd. · 1994
- Lens device comprising light blocking means and an optical pickup apparatus using the lens device70US 5,665,957 ASamsung Electronics Co., Ltd. · 1997
- Optical focussing device68US 4,023,033 AThomson-Brandt · 1977