G11B 20/00927
Wherein said defects or errors are generated on purpose
Official title: {wherein said defects or errors are generated on purpose, e.g. intended scratches}
G11B20/00927 (Wherein said defects or errors are generated on purpose) appears on 198 US grants and 235 published applications in this corpus.
Search patents in G11B- Granted patents
- 198
- Published applications
- 235
- Assignees
- 93
- Inventors
- 311
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 9 | 2 |
| 2002 | 2 | 15 |
| 2003 | 6 | 23 |
| 2004 | 7 | 17 |
| 2005 | 6 | 30 |
| 2006 | 14 | 19 |
| 2007 | 9 | 27 |
| 2008 | 14 | 47 |
| 2009 | 21 | 14 |
| 2010 | 18 | 11 |
| 2011 | 12 | 5 |
| 2012 | 15 | 9 |
| 2013 | 7 | 4 |
| 2014 | 7 | 2 |
| 2015 | 3 | 2 |
| 2016 | 5 | 1 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 2 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- G11B 20/00949Said intentional errors occurring due to bad sectors, which are either physically35
- G11B 20/00942Said intentional errors occurring due to an invalid playback path or program9
- G11B 20/00956Said intentional errors occurring due to an invalid toc9
- G11B 20/00934Said intentional errors occurring because of corrupted address information5
Recent patents
- Simple nonautonomous peering media clone detection25 Nov 2025US 12,481,729 B2Warner Bros. Entertainment Inc.
- Magnetic disk device21 Jan 2025US 12,205,617 B2Kabushiki Kaisha Toshiba
- Method and apparatus for delivering encoded content21 Jun 2022US 11,366,878 B2
- Magnetic disk device configured to write parity data that is based on data being written to a parity sector when no error is detected in writing the data being written10 Dec 2019US 10,504,550 B2Kabushiki Kaisha Toshiba
- Method of performing read/write process on recording medium, parameter adjustment method, storage device, computer system, and storage medium employing the methods1 Oct 2019US 10,431,256 B2Seagate Technology LLC
- Magnetic disk device5 Sep 2024US 2024/0296869 A1Kabushiki Kaisha Toshiba
- Simple nonautonomous peering media clone detection2 May 2024US 2024/0143728 A1Warner Bros. Entertainment Inc.
- Magnetic disk device configured to write parity data that is based on data being written to a parity sector when noo error is detected in writing the data being written12 Sep 2019US 2019/0279678 A1Kabushiki Kaisha Toshiba
- Method and apparatus for delivering encoded content8 Aug 2019US 2019/0243948 A1
- Method of performing read/write process on recording medium, parameter adjustment method, storage device, computer system, and storage medium employing the methods13 Sep 2018US 2018/0261248 A1Seagate Technology LLC
Most cited
By later US patents
- Copyprotecting system for software protection235US 4,584,641 A1986
- Hardware key-on-disk system for copy-protecting magnetic storage media230US 4,577,289 AInternational Business Machines Corporation · 1986
- Method for utilizing medium nonuniformities to minimize unauthorized duplication of digital information183US 5,412,718 AInstitute of Systems Science · 1995
- Computer program protection method180US 4,462,078 A1984
- Unauthorized use prevention method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatus119US 5,418,852 AFujitsu Limited · 1995