G11B 7/1275
Two or more lasers having different wavelengths
G11B7/1275 (Two or more lasers having different wavelengths) appears on 675 US grants and 892 published applications in this corpus.
Search patents in G11B- Granted patents
- 675
- Published applications
- 892
- Assignees
- 156
- Inventors
- 1,172
- Latest grant
- 18 Jun 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 13 | 0 |
| 2001 | 14 | 12 |
| 2002 | 19 | 35 |
| 2003 | 20 | 54 |
| 2004 | 27 | 76 |
| 2005 | 30 | 119 |
| 2006 | 48 | 120 |
| 2007 | 69 | 101 |
| 2008 | 73 | 119 |
| 2009 | 61 | 84 |
| 2010 | 86 | 64 |
| 2011 | 103 | 42 |
| 2012 | 40 | 30 |
| 2013 | 35 | 19 |
| 2014 | 9 | 7 |
| 2015 | 4 | 2 |
| 2016 | 2 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 4 |
| 2022 | 4 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Optical disc device and recording and reproduction device18 Jun 2024US 12,014,761 B2Panasonic Intellectual Property Management Co., Ltd.
- Efficient reading of birefringent data11 Apr 2023US 11,624,700 B2Microsoft Technology Licensing, LLC
- Objective lens, optical head device, optical information device, and optical disk system18 Oct 2022US 11,475,917 B2Panasonic Intellectual Property Management Co., Ltd.
- Efficient reading of birefringent data23 Aug 2022US 11,422,086 B2Microsoft Technology Licensing, LLC
- Background correction for birefringence measurements24 May 2022US 11,341,620 B2Microsoft Technology Licensing, LLC
- Optical disc device and recording and reproduction device18 Jan 2024US 2024/0021214 A1Panasonic Intellectual Property Management Co., Ltd.
- Data read/write apparatus and electronic device13 Jul 2023US 2023/0223046 A1Huawei Technologies Co., Ltd.
- Efficient reading of birefringent data22 Dec 2022US 2022/0404268 A1Microsoft Technology Licensing, LLC
- Efficient reading of birefringent data11 Nov 2021US 2021/0349010 A1Microsoft Technology Licensing, LLC
- Background correction for birefringence measurements11 Nov 2021US 2021/0350510 A1Microsoft Technology Licensing, LLC
Most cited
By later US patents
- Method and apparatus for storage and retrieval with multilayer optical disks276US 5,526,338 AYeda Research and Development Co. Ltd. · 1996
- Multiple wavelengths semiconductor laser device131US 7,483,468 B2Kabushiki Kaisha Toshiba · 2009
- Compatible optical pick-up apparatus for recording and reproducing information from recording media having different formats63US 6,442,124 B1Samsung Electronics Co., Ltd. · 2002
- Single objective lens for use with CD or DVD optical disks59US 6,088,322 A2000
- Optical recording medium discriminating apparatus using laser beams of different wavelengths56US 5,963,523 AMatsushita Electric Industrial Co., Ltd. · 1999