G11B 20/182
Using test patterns
Official title: {using test patterns}
G11B20/182 (Using test patterns) appears on 302 US grants and 136 published applications in this corpus.
Search patents in G11B- Granted patents
- 302
- Published applications
- 136
- Assignees
- 122
- Inventors
- 664
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 9 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 12 | 0 |
| 1996 | 15 | 0 |
| 1997 | 11 | 0 |
| 1998 | 13 | 0 |
| 1999 | 13 | 0 |
| 2000 | 17 | 0 |
| 2001 | 10 | 1 |
| 2002 | 5 | 7 |
| 2003 | 8 | 6 |
| 2004 | 4 | 10 |
| 2005 | 6 | 5 |
| 2006 | 8 | 18 |
| 2007 | 12 | 16 |
| 2008 | 7 | 15 |
| 2009 | 7 | 9 |
| 2010 | 9 | 10 |
| 2011 | 13 | 6 |
| 2012 | 10 | 6 |
| 2013 | 10 | 3 |
| 2014 | 8 | 6 |
| 2015 | 10 | 3 |
| 2016 | 6 | 4 |
| 2017 | 6 | 3 |
| 2018 | 3 | 0 |
| 2019 | 6 | 2 |
| 2020 | 3 | 3 |
| 2021 | 4 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Data storage device configuration using mutual information29 Jul 2025US 12,374,365 B2Western Digital Technologies, Inc.
- Modulation code and ECC rate optimization using symbol context mutual information27 May 2025US 12,315,534 B2Western Digital Technologies, Inc.
- End-to-end fixity check for archival storage based on high-performance integrity test with data quality using self-describing tape format28 Mar 2023US 11,615,813 B1Quantum Corporation
- Data storage device measuring HAMR media distributions15 Mar 2022US 11,276,432 B1Western Digital Technologies, Inc.
- Control method for a memory device9 Nov 2021US 11,169,894 B1NS Poles Technology Corp.
- Data Storage Device Configuration Using Mutual Information8 Aug 2024US 2024/0265943 A1Western Digital Technologies, Inc.
- Modulation Code and ECC Rate Optimization Using Symbol Context Mutual Information8 Aug 2024US 2024/0265948 A1Western Digital Technologies, Inc.
- Testing assembly for sealed hard disk drives7 Jan 2021US 2021/0005226 A1Seagate Technology LLC
- Storage device manufacturing and associated block chain generation thereof5 Mar 2020US 2020/0073970 A1Seagate Technology LLC
- Detecting damaged areas on magnetic tape media using diagnostics locate13 Feb 2020US 2020/0051591 A1International Business Machines Corporation
Most cited
By later US patents
- Hard disk drive infant mortality test215US 6,408,406 B1Western Digital Technologies, Inc. · 2002
- Disk drive expediting defect scan when quality metric exceeds a more stringent threshold202US 8,014,094 B1Western Digital Technologies, Inc. · 2011
- Optimizing order of error recovery steps in a disk drive178US 7,451,344 B1Western Digital Technologies, Inc. · 2008
- Apparatus and method for calibrating recording and transmission systems169US 4,773,094 A1988
- Disk drive determining a head-switch preheat period used to format a disk147US 7,330,323 B1Western Digital Technologies, Inc. · 2008