G11B 20/00123
The record carrier being identified by recognising some of its unique characteristics
Official title: {the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier}
G11B20/00123 (The record carrier being identified by recognising some of its unique characteristics) appears on 278 US grants and 212 published applications in this corpus.
Search patents in G11B- Granted patents
- 278
- Published applications
- 212
- Assignees
- 101
- Inventors
- 424
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 10 | 0 |
| 1998 | 10 | 0 |
| 1999 | 10 | 0 |
| 2000 | 16 | 0 |
| 2001 | 15 | 8 |
| 2002 | 19 | 23 |
| 2003 | 16 | 20 |
| 2004 | 13 | 23 |
| 2005 | 9 | 26 |
| 2006 | 19 | 21 |
| 2007 | 12 | 17 |
| 2008 | 14 | 17 |
| 2009 | 15 | 16 |
| 2010 | 16 | 14 |
| 2011 | 10 | 5 |
| 2012 | 11 | 4 |
| 2013 | 12 | 7 |
| 2014 | 7 | 1 |
| 2015 | 5 | 4 |
| 2016 | 5 | 1 |
| 2017 | 1 | 1 |
| 2018 | 3 | 1 |
| 2019 | 2 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Simple nonautonomous peering media clone detection25 Nov 2025US 12,481,729 B2Warner Bros. Entertainment Inc.
- Method and apparatus for information carrier authentication13 Oct 2020US 10,803,900 B2Intrinsic Id B.V.
- Data security system that uses a repeatable magnetic signature as a weak entropy source2 Jul 2019US 10,341,115 B2Seagate Technology LLC
- System and method for tape layout optimization11 Jun 2019US 10,319,406 B2Quantum Corporation
- Optical disc authentication by interferometric fingerprinting6 Nov 2018US 10,121,509 B2Thomson Licensing
- Simple nonautonomous peering media clone detection2 May 2024US 2024/0143728 A1Warner Bros. Entertainment Inc.
- System and Method for Encrypted Disk Drive Sanitizing24 Oct 2019US 2019/0324678 A1Whitecanyon Software, Inc.
- System and method for tape layout optimization24 Jan 2019US 2019/0027186 A1Quantum Corporation
- Data Security System That Uses a Repeatable Magnetic Signature as a Weak Entropy Source1 Mar 2018US 2018/0062850 A1Seagate Technology LLC
- Optical disc authentication by interferometric fingerprinting25 May 2017US 2017/0148480 A1Thomson Licensing
Most cited
By later US patents
- Methods and systems for encoding and protecting data using digital signature and watermarking techniques486US 6,785,815 B1Intertrust Technologies Corporation · 2004
- Encoding system404US 4,972,471 A1990
- Method and apparatus for improved fingerprinting and authenticating various magnetic media361US 5,740,244 AWashington University · 1998
- Method and apparatus for copy protection for various recording media255US 5,513,260 AMacrovision Corporation · 1996
- Content protection for transmission systems240US 5,949,877 AIntel Corporation · 1999