G11B 7/09
With provision for moving the light beam or focus plane for the
Official title: with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
G11B7/09 (With provision for moving the light beam or focus plane for the) appears on 6,828 US grants and 4,239 published applications in this corpus.
Search patents in G11B- Granted patents
- 6,828
- Published applications
- 4,239
- Assignees
- 657
- Inventors
- 6,521
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 33 | 0 |
| 1977 | 31 | 0 |
| 1978 | 25 | 0 |
| 1979 | 21 | 0 |
| 1980 | 24 | 0 |
| 1981 | 27 | 0 |
| 1982 | 38 | 0 |
| 1983 | 42 | 0 |
| 1984 | 56 | 0 |
| 1985 | 82 | 0 |
| 1986 | 80 | 0 |
| 1987 | 114 | 0 |
| 1988 | 127 | 0 |
| 1989 | 159 | 0 |
| 1990 | 108 | 0 |
| 1991 | 157 | 0 |
| 1992 | 219 | 0 |
| 1993 | 175 | 0 |
| 1994 | 120 | 0 |
| 1995 | 154 | 0 |
| 1996 | 208 | 0 |
| 1997 | 225 | 0 |
| 1998 | 304 | 0 |
| 1999 | 262 | 0 |
| 2000 | 260 | 0 |
| 2001 | 280 | 165 |
| 2002 | 276 | 415 |
| 2003 | 270 | 340 |
| 2004 | 288 | 388 |
| 2005 | 215 | 504 |
| 2006 | 344 | 389 |
| 2007 | 315 | 426 |
| 2008 | 261 | 462 |
| 2009 | 259 | 351 |
| 2010 | 283 | 218 |
| 2011 | 350 | 151 |
| 2012 | 213 | 127 |
| 2013 | 166 | 91 |
| 2014 | 101 | 92 |
| 2015 | 50 | 33 |
| 2016 | 32 | 26 |
| 2017 | 20 | 13 |
| 2018 | 21 | 13 |
| 2019 | 4 | 7 |
| 2020 | 5 | 3 |
| 2021 | 3 | 8 |
| 2022 | 7 | 8 |
| 2023 | 3 | 1 |
| 2024 | 3 | 3 |
| 2025 | 6 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 7/0901For track following only2,090
- G11B 7/0908For focusing only1,576
- G11B 7/095Specially adapted for discs1,289
- G11B 7/0925Electromechanical actuators for lens positioning1,190
- G11B 7/0945Methods for initialising servos, start-up sequences852
- G11B 7/0938Servo format841
- G11B 7/094Methods and circuits for servo offset compensation824
- G11B 7/0941Methods and circuits for servo gain or phase compensation during operation567
All 11 subgroupsShow fewer
- G11B 7/0943Methods and circuits for performing mathematical operations on individual detector segment outputs488
- G11B 7/0948Specially adapted for detection and avoidance or compensation of imperfections on the452
- G11B 7/0946Specially adapted for operation during external perturbations not related to the carrier346
Recent patents
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- Method of forming birefringent structures in an optical element1 Apr 2025US 12,265,245 B2University of Southampton
- Multi-beam writing apparatus and multi-beam writing method17 Sep 2026US 2026/0279395 A1NuFlare Technology, Inc.
- Measurement apparatus for determining a velocity of a fluid27 Aug 2026US 2026/0253613 A1Airbus Helicopters Deutschland GmbH
- Super-resolution three-dimensional optical storage focusing servo device and method thereof23 Jul 2026US 2026/0212888 A1Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
- Device and method for generating coherent terahertz radiation25 Jun 2026US 2026/0180286 A1Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Hybrid Digital and Analog Data Storage17 Apr 2025US 2025/0124952 A1Ceramic Data Solutions GmbH
Most cited
By later US patents
- Fiber optic needle probes for optical coherence tomography imaging722US 6,564,087 B1Massachusetts Institute of Technology · 2003
- Apparatus and method for accessing data on multilayered optical media317US 5,784,352 AMassachusetts Institute of Technology · 1998
- Disc reproducing apparatus275US 5,740,143 ASony Corporation · 1998
- Information retrieval system and apparatus251US 4,536,866 AVideonics of Hawaii, Inc. · 1985
- Optical reproducing method215US 6,549,497 B2Hitachi, Ltd. · 2003