G11B 17/038
Centering or locking of a plurality of discs in a single cartridge
G11B17/038 (Centering or locking of a plurality of discs in a single cartridge) appears on 465 US grants and 218 published applications in this corpus.
Search patents in G11B- Granted patents
- 465
- Published applications
- 218
- Assignees
- 124
- Inventors
- 729
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 12 | 0 |
| 1988 | 10 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 13 | 0 |
| 1995 | 10 | 0 |
| 1996 | 23 | 0 |
| 1997 | 11 | 0 |
| 1998 | 25 | 0 |
| 1999 | 19 | 0 |
| 2000 | 16 | 0 |
| 2001 | 26 | 8 |
| 2002 | 20 | 21 |
| 2003 | 27 | 28 |
| 2004 | 26 | 25 |
| 2005 | 12 | 24 |
| 2006 | 16 | 29 |
| 2007 | 26 | 15 |
| 2008 | 14 | 19 |
| 2009 | 14 | 1 |
| 2010 | 13 | 1 |
| 2011 | 6 | 3 |
| 2012 | 3 | 0 |
| 2013 | 3 | 1 |
| 2014 | 4 | 2 |
| 2015 | 2 | 2 |
| 2016 | 2 | 2 |
| 2017 | 6 | 3 |
| 2018 | 2 | 2 |
| 2019 | 4 | 3 |
| 2020 | 5 | 5 |
| 2021 | 2 | 3 |
| 2022 | 3 | 2 |
| 2023 | 4 | 7 |
| 2024 | 8 | 8 |
| 2025 | 5 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing ring-shaped object, film-forming device, ring-shaped object, and hard disk drive device9 Jun 2026US 12,649,687 B2Hoya Corporation
- Glass for magnetic recording medium substrate or for glass spacer to be used in magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, and magnetic recording/reproducing apparatus18 Nov 2025US 12,473,225 B2Hoya Corporation
- Hard disk drive including annular spacer with inclined region on main surface19 Aug 2025US 12,394,439 B2Hoya Corporation
- Data cartridge magazine and library system18 Mar 2025US 12,254,897 B1MagNext Ltd.
- Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus28 Jan 2025US 12,211,533 B2Hoya Corporation
- Variable height media and spacer combination16 Apr 2026US 2026/0105933 A1Seagate Technology LLC
- Glass for magnetic recording medium substrate or for glass spacer to be used in magnetic recording/reproducing device, magnetic recording medium substrate, magnetic recording medium, and magnetic recording/reproducing apparatus26 Feb 2026US 2026/0055020 A1Hoya Corporation
- Hard disk drive18 Dec 2025US 2025/0384898 A1Hoya Corporation
- Glass for magnetic recording medium substrate, magnetic recording medium substrate, magnetic recording medium, glass spacer for magnetic recording and reproducing apparatus, and magnetic recording and reproducing apparatus1 May 2025US 2025/0140290 A1Hoya Corporation
- Hard disk drive17 Oct 2024US 2024/0347076 A1Hoya Corporation
Most cited
By later US patents
- Spacer rings to compensate for disk warpage80US 6,381,092 B1Komag, Inc. · 2002
- Method for adjusting rotation balance of disk and device for the same77US 5,811,678 AInternational Business Machines Corporation · 1998
- Balance ring77US 6,778,353 B1Komag, Inc. · 2004
- Disc clamping system for a hard disc drive76US 5,731,928 ASeagate Technology LLC · 1998
- Method and apparatus for controlling radial disk displacement in Winchester disk drives72US 4,754,351 AMaxtor Corporation · 1988