G11B 7/0938
Servo format
Official title: {servo format, e.g. guide tracks, pilot signals}
G11B7/0938 (Servo format) appears on 841 US grants and 498 published applications in this corpus.
Search patents in G11B- Granted patents
- 841
- Published applications
- 498
- Assignees
- 165
- Inventors
- 980
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 5 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 10 | 0 |
| 1988 | 12 | 0 |
| 1989 | 19 | 0 |
| 1990 | 19 | 0 |
| 1991 | 17 | 0 |
| 1992 | 18 | 0 |
| 1993 | 16 | 0 |
| 1994 | 10 | 0 |
| 1995 | 26 | 0 |
| 1996 | 37 | 0 |
| 1997 | 33 | 0 |
| 1998 | 36 | 0 |
| 1999 | 31 | 0 |
| 2000 | 32 | 0 |
| 2001 | 38 | 24 |
| 2002 | 44 | 76 |
| 2003 | 61 | 45 |
| 2004 | 37 | 27 |
| 2005 | 27 | 64 |
| 2006 | 64 | 30 |
| 2007 | 23 | 27 |
| 2008 | 21 | 43 |
| 2009 | 27 | 34 |
| 2010 | 17 | 24 |
| 2011 | 31 | 12 |
| 2012 | 23 | 21 |
| 2013 | 20 | 12 |
| 2014 | 32 | 46 |
| 2015 | 9 | 2 |
| 2016 | 3 | 1 |
| 2017 | 1 | 2 |
| 2018 | 3 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 4 |
| 2022 | 3 | 3 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reading voxels in an optical storage medium using off-axis lighting28 Jul 2026US 12,694,901 B1Microsoft Technology Licensing, LLC
- Data storage device with embedded mode hop predictor patterns15 Apr 2025US 12,277,957 B1Western Digital Technologies, Inc.
- Detection apparatus, optical drive, and detection method30 Jan 2024US 11,887,624 B2Huawei Technologies Co., Ltd.
- Positioning method and device for hologram in disk-type holographic storage24 May 2022US 11,341,996 B2Amethystum Storage Technology Co., Ltd.
- Positioning method and device for hologram in card-type holographic storage medium17 May 2022US 11,335,370 B2Amethystum Storage Technology Co., Ltd.
- Holographic storage optical system and beam calibrating method thereof22 Dec 2022US 2022/0404766 A1Amethystum Storage Technology Co., Ltd.
- Transmission-type holographic optical storage medium and device, and method for recording and reading on two sides of storage medium22 Dec 2022US 2022/0404767 A1Amethystum Storage Technology Co., Ltd.
- Detection Apparatus, Optical Drive, and Detection Method18 Aug 2022US 2022/0262398 A1Huawei Technologies Co., Ltd.
- Method and device for accurately detecting and controlling position of optical head and optical disk22 Jul 2021US 2021/0225398 A1Amethystum Storage Technology Co., Ltd.
- Positioning method and device for hologram in disk-type holographic storage22 Jul 2021US 2021/0225400 A1Amethystum Storage Technology Co., Ltd.
Most cited
By later US patents
- Optical reproducing method215US 6,549,497 B2Hitachi, Ltd. · 2003
- Optical disk capable of recording information on both groove and land tracks152US 5,508,995 AMatsushita Electric Industrial Co., Ltd. · 1996
- Optical disk136US 5,383,176 ASharp Kabushiki Kaisha · 1995
- Optical disk recording and reproducing apparatus with data recorded on wobbled grooves and lands112US 5,537,373 AKabushiki Kaisha Kenwood · 1996
- Multi-format optical disk and reading device99US 4,967,403 ASony Corporation · 1990