G11B 23/34
Signal means additional to the main recording track
Official title: Signal means additional to the main recording track, e.g. photoelectric sensing of sprocket holes for timing
G11B23/34 (Signal means additional to the main recording track) appears on 64 US grants and 21 published applications in this corpus.
Search patents in G11B- Granted patents
- 64
- Published applications
- 21
- Assignees
- 24
- Inventors
- 80
- Latest grant
- 28 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 7 | 0 |
| 2001 | 11 | 0 |
| 2002 | 6 | 5 |
| 2003 | 4 | 1 |
| 2004 | 2 | 2 |
| 2005 | 2 | 3 |
| 2006 | 4 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 0 |
| 2011 | 2 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Measurement device, measurement method, recording medium, and phonograph record28 Jan 2025US 12,211,518 B2Panasonic Intellectual Property Management Co., Ltd.
- Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk25 Jun 2013US 8,472,291 B2Panasonic Corporation
- Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk6 Sep 2011US 8,014,236 B2Panasonic Corporation
- Optical article having a material capable of undergoing a morphological transformation as an anti-theft feature and a system and method for inhibiting theft of same7 Jun 2011US 7,955,681 B2NBCUniversal Media, LLC
- Storage device and method for operating a storage device30 Nov 2010US 7,843,795 B2International Business Machines Corporation
- Measurement device, measurement method, recording medium, and phonograph record6 Apr 2023US 2023/0109304 A1Panasonic Intellectual Property Management Co., Ltd.
- Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk24 Nov 2011US 2011/0286315 A1Panasonic Corporation
- Recording medium, attaching kit for attaching encryption key sticker to the recording medium, and recording apparatus and reproducing apparatus for the recording medium31 Dec 2009US 2009/0327761 A1Pioneer Corporation
- Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk2 Jul 2009US 2009/0168619 A1Panasonic Corporation
- Storage Device and Method for Operating a Storage Device1 Jan 2009US 2009/0003187 A1International Business Machines Corporation
Most cited
By later US patents
- Optical disk, optical disk recording and reproducing apparatus, method for recording, reproducing and deleting data on optical disk, and information processing system144US 6,938,162 B1Matsushita Electric Industrial Co., Ltd. · 2005
- Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk108US 6,052,465 AMatsushita Electric Industrial Co., Ltd. · 2000
- Information recording media and optical disc presenting a character or a graphic pattern formed by specified pit patterns on data tracks100US 5,608,717 AHitachi, Ltd. · 1997
- Method for recording and identifying integrated circuit chips and the like68US 5,801,067 A1998
- Method and apparatus for indexing and retrieval of a continuous visual image medium46US 5,532,773 A1996