G11B 5/739
Magnetic recording media substrates
Official title: {Magnetic recording media substrates}
G11B5/739 (Magnetic recording media substrates) appears on 1,464 US grants and 922 published applications in this corpus.
Search patents in G11B- Granted patents
- 1,464
- Published applications
- 922
- Assignees
- 269
- Inventors
- 2,230
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 25 | 0 |
| 1986 | 31 | 0 |
| 1987 | 38 | 0 |
| 1988 | 29 | 0 |
| 1989 | 30 | 0 |
| 1990 | 22 | 0 |
| 1991 | 25 | 0 |
| 1992 | 37 | 0 |
| 1993 | 28 | 0 |
| 1994 | 39 | 0 |
| 1995 | 46 | 0 |
| 1996 | 47 | 0 |
| 1997 | 39 | 0 |
| 1998 | 48 | 0 |
| 1999 | 78 | 0 |
| 2000 | 64 | 0 |
| 2001 | 74 | 42 |
| 2002 | 57 | 56 |
| 2003 | 41 | 84 |
| 2004 | 71 | 59 |
| 2005 | 43 | 65 |
| 2006 | 29 | 43 |
| 2007 | 30 | 45 |
| 2008 | 22 | 37 |
| 2009 | 24 | 46 |
| 2010 | 21 | 33 |
| 2011 | 28 | 40 |
| 2012 | 22 | 23 |
| 2013 | 23 | 17 |
| 2014 | 36 | 22 |
| 2015 | 27 | 19 |
| 2016 | 11 | 17 |
| 2017 | 23 | 20 |
| 2018 | 9 | 15 |
| 2019 | 7 | 22 |
| 2020 | 22 | 38 |
| 2021 | 38 | 56 |
| 2022 | 46 | 35 |
| 2023 | 34 | 28 |
| 2024 | 25 | 30 |
| 2025 | 17 | 10 |
| 2026 | 17 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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, glass spacer to be used in magnetic recording/reproducing device, and magnetic recording/reproducing device1 Sep 2026US 12,722,997 B2Hoya Corporation
- Aluminum alloy disc blank for magnetic disc and magnetic disc25 Aug 2026US 12,716,117 B2Furukawa Electric Co., Ltd.
- Annular glass plate, method for manufacturing glass substrate for magnetic disk, glass substrate for magnetic disk, and magnetic disk23 Jun 2026US 12,662,418 B2Hoya Corporation
- Magnetic recording media and methods and apparatus for identifying substrates suitable for magnetic recording media16 Jun 2026US 12,658,209 B1Western Digital Technologies, Inc.
- Magnetic recording medium and cartridge2 Jun 2026US 12,646,531 B2Sony Group Corporation
- Disk-shaped glass plate and magnetic disk20 Aug 2026US 2026/0242271 A1Hoya Corporation
- Magnetic recording medium13 Aug 2026US 2026/0237402 A1Sony Group Corporation
- Magnetic recording medium with amorphous metallic alloy overcoat and magnetic recording apparatus for use therewith6 Aug 2026US 2026/0229251 A1Western Digital Technologies, Inc.
- Magnetic recording medium6 Aug 2026US 2026/0229252 A1Sony Group Corporation
- Magnetic recording media/disks and methods and apparatus for identifying magnetic recording media/disks suitable for data storage devices6 Aug 2026US 2026/0229253 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Disc substrates for information recording discs and magnetic discs171US 6,214,429 B1Hoya Corporation · 2001
- Glass substrate for information recording medium and magnetic information recording medium to which the glass substrate is applied131US 6,818,576 B2Hoya Corporation · 2004
- Magnetic recording tape126US 6,228,461 B1Fuji Photo Film Co., Ltd. · 2001
- Aromatic polyamide-type films125US 3,966,686 AToray Industries, Inc. · 1976
- Magnetic recording medium125US 5,728,454 AFuji Photo Film Co., Ltd. · 1998