G11B 7/0903
Multi-beam tracking systems
Official title: {Multi-beam tracking systems}
G11B7/0903 (Multi-beam tracking systems) appears on 678 US grants and 483 published applications in this corpus.
Search patents in G11B- Granted patents
- 678
- Published applications
- 483
- Assignees
- 148
- Inventors
- 1,058
- Latest grant
- 7 Mar 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 10 | 0 |
| 1986 | 10 | 0 |
| 1987 | 8 | 0 |
| 1988 | 13 | 0 |
| 1989 | 9 | 0 |
| 1990 | 10 | 0 |
| 1991 | 13 | 0 |
| 1992 | 17 | 0 |
| 1993 | 14 | 0 |
| 1994 | 6 | 0 |
| 1995 | 12 | 0 |
| 1996 | 26 | 0 |
| 1997 | 30 | 0 |
| 1998 | 43 | 0 |
| 1999 | 26 | 0 |
| 2000 | 16 | 0 |
| 2001 | 23 | 18 |
| 2002 | 20 | 43 |
| 2003 | 22 | 37 |
| 2004 | 33 | 33 |
| 2005 | 22 | 49 |
| 2006 | 39 | 43 |
| 2007 | 29 | 49 |
| 2008 | 22 | 57 |
| 2009 | 30 | 47 |
| 2010 | 39 | 35 |
| 2011 | 45 | 25 |
| 2012 | 38 | 22 |
| 2013 | 15 | 8 |
| 2014 | 12 | 7 |
| 2015 | 6 | 3 |
| 2016 | 2 | 2 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Diffractive optical element, projection device and measuring device7 Mar 2023US 11,598,972 B2AGC Inc.
- Radial servo device for super-resolution optical disc and servo control method therefor18 Jan 2022US 11,227,632 B2Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
- Recording/reproducing apparatus6 Jun 2017US 9,672,860 B2Kabushiki Kaisha Toshiba
- Optical pickup and optical recording and reproducing device7 Jun 2016US 9,361,927 B2Panasonic Intellectual Property Management Co., Ltd.
- Optical recording and playback apparatus3 May 2016US 9,330,705 B2Panasonic Intellectual Property Management Co., Ltd.
- Multi-beam writing apparatus and multi-beam writing method17 Sep 2026US 2026/0279395 A1NuFlare Technology, Inc.
- Device and method for generating coherent terahertz radiation25 Jun 2026US 2026/0180286 A1Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Radial servo device for super-resolution optical disc and servo control method therefor20 May 2021US 2021/0151079 A1Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
- Diffractive optical element, projection device and measuring device9 Apr 2020US 2020/0110277 A1AGC Inc.
- Hydraulic pump/motor with rotation detection mechanism28 Sep 2017US 2017/0276055 A1Komatsu Ltd.
Most cited
By later US patents
- 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 disk recording and reproducing apparatus with data recorded on wobbled grooves and lands112US 5,537,373 AKabushiki Kaisha Kenwood · 1996
- Optical head apparatus for different types of disks78US 5,696,750 ANEC Corporation · 1997
- Short wavelength optical disk head having a changeable aperture76US 5,281,797 AHitachi, Ltd. · 1994
- Information reproducing apparatus with plural beam readout62US 4,085,423 AHitachi, Ltd. · 1978