G11B 20/1879
Direct read-after-write methods
Official title: {Direct read-after-write methods}
G11B20/1879 (Direct read-after-write methods) appears on 407 US grants and 274 published applications in this corpus.
Search patents in G11B- Granted patents
- 407
- Published applications
- 274
- Assignees
- 126
- Inventors
- 765
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 11 | 0 |
| 1993 | 12 | 0 |
| 1994 | 15 | 0 |
| 1995 | 15 | 0 |
| 1996 | 12 | 0 |
| 1997 | 12 | 0 |
| 1998 | 11 | 0 |
| 1999 | 18 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 1 |
| 2002 | 7 | 6 |
| 2003 | 13 | 12 |
| 2004 | 7 | 11 |
| 2005 | 8 | 15 |
| 2006 | 16 | 21 |
| 2007 | 9 | 28 |
| 2008 | 17 | 55 |
| 2009 | 13 | 23 |
| 2010 | 32 | 23 |
| 2011 | 28 | 14 |
| 2012 | 15 | 14 |
| 2013 | 15 | 9 |
| 2014 | 17 | 7 |
| 2015 | 9 | 5 |
| 2016 | 8 | 7 |
| 2017 | 5 | 1 |
| 2018 | 4 | 4 |
| 2019 | 4 | 3 |
| 2020 | 2 | 0 |
| 2021 | 1 | 6 |
| 2022 | 7 | 3 |
| 2023 | 3 | 1 |
| 2024 | 2 | 4 |
| 2025 | 3 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Magnetic disk device27 Jan 2026US 12,537,027 B1Kabushiki Kaisha Toshiba
- Magnetic disk device12 Aug 2025US 12,387,757 B1Kabushiki Kaisha Toshiba
- Magnetic disk device28 Jan 2025US 12,211,519 B2Kabushiki Kaisha Toshiba
- Magnetic disk device21 Jan 2025US 12,205,617 B2Kabushiki Kaisha Toshiba
- HDD head having same gap verify and system for using same19 Nov 2024US 12,148,447 B1Western Digital Technologies, Inc.
- Magnetic disk device14 Aug 2025US 2025/0259651 A1Kabushiki Kaisha Toshiba
- HDD Head Having Same Gap Verify And System For Using Same14 Nov 2024US 2024/0379125 A1Western Digital Technologies, Inc.
- Magnetic disk device26 Sep 2024US 2024/0321313 A1Kabushiki Kaisha Toshiba
- Magnetic disk device5 Sep 2024US 2024/0296869 A1Kabushiki Kaisha Toshiba
- Magnetic disk device and method28 Mar 2024US 2024/0105230 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Mass data storage and retrieval system997US 5,504,873 AE-Systems, Inc. · 1996
- Disk drive employing data averaging techniques during retry operations to facilitate data recovery238US 7,136,244 B1Western Digital Technologies, Inc. · 2006
- Information writing and reading apparatus186US 5,404,357 AMatsushita Electric Industrial Co., Ltd. · 1995
- Disk drive employing a disk command data structure for tracking a write verify status of a write command186US 7,076,604 B1Western Digital Technologies, Inc. · 2006
- Disk drive employing a disk command data structure for tracking a write verify status of a write command184US 7,120,737 B1Western Digital Technologies, Inc. · 2006