G11B 20/00094
Involving measures which result in a restriction to authorised record carriers
Official title: {involving measures which result in a restriction to authorised record carriers}
G11B20/00094 (Involving measures which result in a restriction to authorised record carriers) appears on 950 US grants and 939 published applications in this corpus.
Search patents in G11B- Granted patents
- 950
- Published applications
- 939
- Assignees
- 200
- Inventors
- 1,115
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 15 | 0 |
| 1998 | 24 | 0 |
| 1999 | 18 | 0 |
| 2000 | 24 | 0 |
| 2001 | 25 | 26 |
| 2002 | 43 | 120 |
| 2003 | 66 | 79 |
| 2004 | 57 | 79 |
| 2005 | 43 | 101 |
| 2006 | 76 | 88 |
| 2007 | 68 | 99 |
| 2008 | 76 | 87 |
| 2009 | 62 | 77 |
| 2010 | 75 | 70 |
| 2011 | 67 | 28 |
| 2012 | 55 | 30 |
| 2013 | 39 | 20 |
| 2014 | 29 | 13 |
| 2015 | 21 | 10 |
| 2016 | 9 | 2 |
| 2017 | 4 | 3 |
| 2018 | 6 | 2 |
| 2019 | 5 | 3 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- G11B 20/00115Wherein the record carrier stores a unique medium identifier475
- G11B 20/00123The record carrier being identified by recognising some of its unique characteristics278
- G11B 20/0013Wherein the measure concerns not the entire record carrier, but a specific38
- G11B 20/00108Wherein original, non-rewritable record carriers are recognised by trying to erase recorded9
- G11B 20/00101The original record carrier having a larger recording capacity than the potential4
Recent patents
- Simple nonautonomous peering media clone detection25 Nov 2025US 12,481,729 B2Warner Bros. Entertainment Inc.
- Encrypted data key in medium auxiliary memory31 Aug 2021US 11,107,501 B2Spectra Logic Corporation
- Method and apparatus for information carrier authentication13 Oct 2020US 10,803,900 B2Intrinsic Id B.V.
- Apparatus and method for recording and erasing user data on a recordable optical disc10 Sep 2019US 10,410,671 B2Panasonic Intellectual Property Management Co., Ltd.
- Method and system for conducting business in a transnational E-commerce network9 Jul 2019US RE47,502 E1Innovation Sciences, LLC
- Simple nonautonomous peering media clone detection2 May 2024US 2024/0143728 A1Warner Bros. Entertainment Inc.
- Encrypted data key in medium auxiliary memory14 May 2020US 2020/0152235 A1Spectra Logic Corporation
- System and Method for Encrypted Disk Drive Sanitizing24 Oct 2019US 2019/0324678 A1Whitecanyon Software, Inc.
- Information recording apparatus and data erasure method28 Feb 2019US 2019/0066726 A1Panasonic Intellectual Property Management Co., Ltd.
- System and method for tape layout optimization24 Jan 2019US 2019/0027186 A1Quantum Corporation
Most cited
By later US patents
- Methods for surveying dissemination of proprietary empirical data1,132US 5,862,260 ADigimarc Corporation · 1999
- Computer system linked by using information in data objects1,131US 6,122,403 ADigimarc Corporation · 2000
- Connected audio and other media objects859US 6,505,160 B1Digimarc Corporation · 2003
- Network linking method using steganographically embedded data objects665US 5,841,978 ADigimarc Corporation · 1998
- Graphics processing system employing embedded code signals621US 5,768,426 ADigimarc Corporation · 1998