G11B 5/59661
Spiral servo format
Official title: {Spiral servo format}
G11B5/59661 (Spiral servo format) appears on 192 US grants and 74 published applications in this corpus.
Search patents in G11B- Granted patents
- 192
- Published applications
- 74
- Assignees
- 33
- Inventors
- 228
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 4 | 0 |
| 2006 | 11 | 4 |
| 2007 | 15 | 12 |
| 2008 | 19 | 9 |
| 2009 | 14 | 6 |
| 2010 | 17 | 5 |
| 2011 | 16 | 4 |
| 2012 | 6 | 3 |
| 2013 | 11 | 5 |
| 2014 | 18 | 1 |
| 2015 | 12 | 1 |
| 2016 | 3 | 3 |
| 2017 | 4 | 2 |
| 2018 | 7 | 3 |
| 2019 | 4 | 2 |
| 2020 | 2 | 1 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 6 | 6 |
| 2024 | 5 | 2 |
| 2025 | 4 | 2 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Data storage device with spiral write mode hop mitigation7 Jul 2026US 12,676,167 B1Western Digital Technologies, Inc.
- Magnetic recording device and a method for manufacturing the same3 Mar 2026US 12,567,441 B2Kabushiki Kaisha Toshiba
- Coherent repeatable runout correction for reduced rpm self-servo write24 Feb 2026US 12,562,190 B1Kabushiki Kaisha Toshiba
- Method of manufacturing disk device, and disk device25 Nov 2025US 12,482,491 B2Kabushiki Kaisha Toshiba
- Parallel self-servo write circuitry in a data storage device15 Jul 2025US 12,361,970 B1Western Digital Technologies, Inc.
- Data storage device with spiral write mode hop mitigation9 Jul 2026US 2026/0196244 A1Western Digital Technologies, Inc.
- Method of manufacturing disk device, and disk device18 Sep 2025US 2025/0292795 A1Kabushiki Kaisha Toshiba
- Magnetic recording device and a method for manufacturing the same28 Aug 2025US 2025/0273238 A1Kabushiki Kaisha Toshiba
- Magnetic disk device and reference pattern writing method of the same7 Mar 2024US 2024/0079028 A1Kabushiki Kaisha Toshiba
- Offset Spiral Data Track Format for Data Storage Devices4 Jan 2024US 2024/0005959 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- System for self-servowriting a disk drive251US 5,668,679 AQuantum Corporation · 1997
- Disk drive with calibration bursts that are recorded on a spiral and method of recording the same194US 6,091,564 AWestern Digital Corporation · 2000
- Method of continuously recording servo bursts along one continuous, single helix spiral192US 6,507,450 B1Western Digital Technologies, Inc. · 2003
- Servo writing a disk drive by synchronizing a servo write clock to a high frequency signal in a spiral track187US 6,943,978 B1Western Digital Technologies, Inc. · 2005
- Servo writing a disk drive by integrating a spiral track read signal169US 7,301,717 B1Western Digital Technologies, Inc. · 2007