G11B 20/18
Error detection or correction
Official title: Error detection or correction; Testing {, e.g. of drop-outs}
G11B20/18 (Error detection or correction) appears on 6,989 US grants and 4,513 published applications in this corpus.
Search patents in G11B- Granted patents
- 6,989
- Published applications
- 4,513
- Assignees
- 826
- Inventors
- 7,691
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 10 | 0 |
| 1978 | 5 | 0 |
| 1979 | 14 | 0 |
| 1980 | 14 | 0 |
| 1981 | 19 | 0 |
| 1982 | 30 | 0 |
| 1983 | 37 | 0 |
| 1984 | 50 | 0 |
| 1985 | 75 | 0 |
| 1986 | 64 | 0 |
| 1987 | 87 | 0 |
| 1988 | 69 | 0 |
| 1989 | 96 | 0 |
| 1990 | 70 | 0 |
| 1991 | 62 | 0 |
| 1992 | 91 | 0 |
| 1993 | 113 | 0 |
| 1994 | 132 | 0 |
| 1995 | 178 | 0 |
| 1996 | 171 | 0 |
| 1997 | 170 | 0 |
| 1998 | 252 | 0 |
| 1999 | 209 | 0 |
| 2000 | 236 | 0 |
| 2001 | 231 | 98 |
| 2002 | 210 | 280 |
| 2003 | 251 | 297 |
| 2004 | 246 | 406 |
| 2005 | 196 | 385 |
| 2006 | 309 | 403 |
| 2007 | 316 | 474 |
| 2008 | 344 | 479 |
| 2009 | 317 | 274 |
| 2010 | 332 | 223 |
| 2011 | 319 | 154 |
| 2012 | 293 | 119 |
| 2013 | 200 | 141 |
| 2014 | 214 | 158 |
| 2015 | 199 | 107 |
| 2016 | 160 | 111 |
| 2017 | 125 | 93 |
| 2018 | 98 | 62 |
| 2019 | 96 | 66 |
| 2020 | 75 | 49 |
| 2021 | 64 | 38 |
| 2022 | 47 | 26 |
| 2023 | 28 | 25 |
| 2024 | 28 | 26 |
| 2025 | 20 | 6 |
| 2026 | 8 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 20/1833By adding special lists or symbols to the coded information2,104
- G11B 20/1816Testing1,722
- G11B 20/1883Methods for assignment of alternate areas for defective areas1,607
- G11B 20/1806Pulse code modulation systems for audio signals740
- G11B 20/1879Direct read-after-write methods407
- G11B 20/1866By interleaving389
- G11B 20/1803By redundancy in data representation289
- G11B 2020/1873Temporary defect structures for write-once discsIndexing code261
Recent patents
- Magnetic disk apparatus23 Jun 2026US 12,665,000 B2Kabushiki Kaisha Toshiba
- Magnetic disk apparatus and method19 May 2026US 12,633,310 B2Kabushiki Kaisha Toshiba
- Tape drive error recovery procedure selection based on humidity5 May 2026US 12,620,414 B2International Business Machines Corporation
- Magnetic disk device and DOL setting method28 Apr 2026US 12,614,566 B2Kabushiki Kaisha Toshiba
- Failure diagnosis method, method of manufacturing disk device, and recording medium7 Apr 2026US 12,596,361 B2Kabushiki Kaisha Toshiba
- Storage medium, magnetic disk device, and data center system24 Sep 2026US 2026/0288607 A1Kabushiki Kaisha Toshiba
- Magnetic disk device and data recording method24 Sep 2026US 2026/0290397 A1Kabushiki Kaisha Toshiba
- Magnetic disk apparatus17 Sep 2026US 2026/0279397 A1Kabushiki Kaisha Toshiba
- Data storage method, device, storage medium, and system20 Aug 2026US 2026/0244528 A1Cloud Intelligence Assets Holding (Singapore) Private Limited
- Magnetic disk device and dol setting method13 Aug 2026US 2026/0237405 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Enhanced raid write hole protection and recovery1,578US 5,774,643 ADigital Equipment Corporation · 1998
- Scheme for information dispersal and reconstruction1,530US 5,485,474 APresident and Fellows of Harvard College · 1996
- System for protecting the transmission of live data streams, and upon reception, for reconstructing the live data streams and recording them into files1,424US 7,024,609 B2Kencast, Inc. · 2006
- Mass data storage and retrieval system997US 5,504,873 AE-Systems, Inc. · 1996
- Embedded signalling739US 5,319,735 ABolt Beranek and Newman Inc. · 1994