G11B 20/00086
Circuits for prevention of unauthorised reproduction or copying
Official title: {Circuits for prevention of unauthorised reproduction or copying, e.g. piracy (indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00)}
G11B20/00086 (Circuits for prevention of unauthorised reproduction or copying) appears on 4,601 US grants and 5,001 published applications in this corpus.
Search patents in G11B- Granted patents
- 4,601
- Published applications
- 5,001
- Assignees
- 891
- Inventors
- 5,733
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 7 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 10 | 0 |
| 1990 | 13 | 0 |
| 1991 | 8 | 0 |
| 1992 | 13 | 0 |
| 1993 | 19 | 0 |
| 1994 | 13 | 0 |
| 1995 | 33 | 0 |
| 1996 | 34 | 0 |
| 1997 | 64 | 0 |
| 1998 | 110 | 0 |
| 1999 | 90 | 0 |
| 2000 | 99 | 0 |
| 2001 | 117 | 111 |
| 2002 | 154 | 467 |
| 2003 | 213 | 393 |
| 2004 | 215 | 429 |
| 2005 | 163 | 542 |
| 2006 | 335 | 509 |
| 2007 | 301 | 568 |
| 2008 | 300 | 460 |
| 2009 | 327 | 361 |
| 2010 | 370 | 273 |
| 2011 | 323 | 178 |
| 2012 | 267 | 152 |
| 2013 | 212 | 111 |
| 2014 | 213 | 95 |
| 2015 | 141 | 71 |
| 2016 | 99 | 56 |
| 2017 | 60 | 47 |
| 2018 | 65 | 43 |
| 2019 | 43 | 38 |
| 2020 | 42 | 41 |
| 2021 | 29 | 20 |
| 2022 | 31 | 12 |
| 2023 | 20 | 7 |
| 2024 | 8 | 9 |
| 2025 | 7 | 5 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 20/0021Involving encryption or decryption of contents recorded on or reproduced from a2,093
- G11B 20/00731Involving a digital rights management system for enforcing a usage restriction1,085
- G11B 20/00094Involving measures which result in a restriction to authorised record carriers950
- G11B 20/00884Involving a watermark, i.e. a barely perceptible transformation of the original data758
- G11B 20/00166Involving measures which result in a restriction to authorised contents recorded on615
- G11B 20/00572Involving measures which change the format of the recording medium601
- G11B 20/00137Involving measures which result in a restriction to contents recorded on or415
- G11B 20/00681Involving measures which prevent a specific kind of data access404
All 17 subgroupsShow fewer
- G11B 20/00188Involving measures which result in a restriction to authorised devices recording or384
- G11B 20/00855Involving a step of exchanging information with a remote server375
- G11B 20/0071Involving a purchase action353
- G11B 20/00876Wherein physical copy protection means are attached to the medium338
- G11B 20/0092Involving measures which are linked to media defects or read/write errors279
- G11B 20/00666Involving a step of erasing or nullifying data140
- G11B 20/00659Involving a control step which is implemented as an executable file stored83
- G11B 20/00978Wherein the record carrier stores a trial version of a content31
- G11B 20/00971Involving measures for monitoring the industrial media production and distribution channels8
Recent patents
- Audio watermark processing method and apparatus, computer device, and storage medium18 Aug 2026US 12,711,971 B2Tencent Technology (Shenzhen) Company Limited
- Method of inserting audio-watermark specialized for music usage and NFT and providing music source11 Aug 2026US 12,705,319 B2
- Detecting electronic system modification28 Apr 2026US 12,613,999 B2International Business Machines Corporation
- Unauthorized readout prevention mechanism and unmanned vehicle24 Mar 2026US 12,583,633 B2NEC Corporation
- Simple nonautonomous peering media clone detection25 Nov 2025US 12,481,729 B2Warner Bros. Entertainment Inc.
- Consumer choice for broadband application and content services9 Apr 2026US 2026/0100950 A1Adeia Media Holdings LLC
- Read after write in a multiple revolution hard disk drive29 Jan 2026US 2026/0031106 A1Seagate Technology LLC
- Transfer stations and methods for transferring autonomous vehicle sensor data to a remote data storage server22 Jan 2026US 2026/0024380 A1TORC Robotics, Inc.
- Systems and methods for managing digital entities9 Oct 2025US 2025/0317451 A1Blockchains, Inc.
- Method and System for Seamless Media Synchronization and Handoff17 Jul 2025US 2025/0231737 A1Apple Inc.
Most cited
By later US patents
- Cryptographic communications system and method1,449US 4,405,829 AMassachusetts Institute of Technology · 1983
- 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
- Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels1,021US 5,943,422 AIntertrust Technologies Corporation · 1999
- System for controlling access and distribution of digital property1,018US 5,933,498 AMRJ, Inc. · 1999