G11B 20/10009
Improvement or modification of read or write signals
Official title: {Improvement or modification of read or write signals}
G11B20/10009 (Improvement or modification of read or write signals) appears on 5,240 US grants and 3,268 published applications in this corpus.
Search patents in G11B- Granted patents
- 5,240
- Published applications
- 3,268
- Assignees
- 609
- Inventors
- 5,159
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 10 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 10 | 0 |
| 1985 | 15 | 0 |
| 1986 | 18 | 0 |
| 1987 | 25 | 0 |
| 1988 | 27 | 0 |
| 1989 | 37 | 0 |
| 1990 | 38 | 0 |
| 1991 | 30 | 0 |
| 1992 | 50 | 0 |
| 1993 | 72 | 0 |
| 1994 | 97 | 0 |
| 1995 | 80 | 0 |
| 1996 | 112 | 0 |
| 1997 | 121 | 0 |
| 1998 | 211 | 0 |
| 1999 | 167 | 0 |
| 2000 | 203 | 0 |
| 2001 | 205 | 51 |
| 2002 | 168 | 223 |
| 2003 | 208 | 209 |
| 2004 | 190 | 245 |
| 2005 | 124 | 254 |
| 2006 | 223 | 253 |
| 2007 | 204 | 331 |
| 2008 | 219 | 236 |
| 2009 | 180 | 196 |
| 2010 | 218 | 181 |
| 2011 | 257 | 151 |
| 2012 | 226 | 130 |
| 2013 | 198 | 116 |
| 2014 | 302 | 164 |
| 2015 | 246 | 121 |
| 2016 | 164 | 95 |
| 2017 | 116 | 60 |
| 2018 | 89 | 57 |
| 2019 | 93 | 38 |
| 2020 | 53 | 45 |
| 2021 | 53 | 28 |
| 2022 | 48 | 24 |
| 2023 | 29 | 22 |
| 2024 | 27 | 18 |
| 2025 | 25 | 9 |
| 2026 | 12 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 20/10046Filtering or equalising1,892
- G11B 20/10305Signal quality assessment756
- G11B 20/10222Clock-related aspects680
- G11B 20/10037A/d conversion, d/a conversion, sampling, slicing and digital quantisation or adjusting parameters667
- G11B 20/10268Bit detection or demodulation methods601
- G11B 20/10481Optimisation methods438
- G11B 20/10018Analog processing for digital recording or reproduction330
Recent patents
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- Magnetic disk device, control method, and learning method8 Sep 2026US 12,731,614 B2Kabushiki Kaisha Toshiba
- Digital timing recovery in hard disk drive read channel for preamble reduction11 Aug 2026US 12,706,119 B1Marvell Asia Pte Ltd
- Magnetic disk device and DOL setting method28 Apr 2026US 12,614,566 B2Kabushiki Kaisha Toshiba
- Sampling methods and systems28 Apr 2026US 12,615,054 B1Alphacore, Inc.
- Data storage device with deferred decoding of analog read signals8 Oct 2026US 2026/0311725 A1Western Digital Technologies, Inc.
- Hybrid Analog Digital Audio Format1 Oct 2026US 2026/0301769 A1Ceramic Data Solutions GmbH
- Magnetic recording device24 Sep 2026US 2026/0290396 A1Kabushiki Kaisha Toshiba
- Magnetic disk device and dol setting method13 Aug 2026US 2026/0237405 A1Kabushiki Kaisha Toshiba
- Data storage device comprising dual channel preamp circuit16 Jul 2026US 2026/0204287 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Embedded signalling739US 5,319,735 ABolt Beranek and Newman Inc. · 1994
- Image steganography system featuring perceptually adaptive and globally scalable signal embedding417US 5,748,763 ADigimarc Corporation · 1998
- Security documents with hidden digital data309US 6,343,138 B12002
- System for encoding sound recordings for high-density storage and high-speed transfers304US 4,937,807 APersonics Corporation · 1990
- PRML sampled data channel synchronous servo detector294US 5,384,671 AQuantum Corporation · 1995