G11B 5/73921
Glass or ceramic substrates
Official title: {Glass or ceramic substrates}
G11B5/73921 (Glass or ceramic substrates) appears on 650 US grants and 545 published applications in this corpus.
Search patents in G11B- Granted patents
- 650
- Published applications
- 545
- Assignees
- 142
- Inventors
- 990
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 9 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 9 | 0 |
| 1996 | 16 | 0 |
| 1997 | 12 | 0 |
| 1998 | 24 | 0 |
| 1999 | 41 | 0 |
| 2000 | 33 | 0 |
| 2001 | 43 | 32 |
| 2002 | 31 | 35 |
| 2003 | 31 | 50 |
| 2004 | 44 | 29 |
| 2005 | 25 | 34 |
| 2006 | 12 | 25 |
| 2007 | 15 | 21 |
| 2008 | 10 | 25 |
| 2009 | 12 | 34 |
| 2010 | 15 | 22 |
| 2011 | 23 | 35 |
| 2012 | 17 | 14 |
| 2013 | 17 | 16 |
| 2014 | 30 | 15 |
| 2015 | 23 | 15 |
| 2016 | 8 | 14 |
| 2017 | 20 | 10 |
| 2018 | 6 | 5 |
| 2019 | 5 | 6 |
| 2020 | 5 | 11 |
| 2021 | 14 | 22 |
| 2022 | 12 | 14 |
| 2023 | 14 | 18 |
| 2024 | 16 | 21 |
| 2025 | 12 | 8 |
| 2026 | 14 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- 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.
- Method for manufacturing glass plate and method for manufacturing magnetic disk19 May 2026US 12,630,458 B2Hoya Corporation
- Method for long-term storage of information and storage medium therefor7 Apr 2026US 12,594,629 B2Ceramic Data Solutions GmbH
- Disk-shaped glass plate and magnetic disk20 Aug 2026US 2026/0242271 A1Hoya 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.
- Glass substrates for heat assisted magnetic recording (hamr) and methods and apparatus for use with the glass substrates6 Aug 2026US 2026/0229254 A1Western Digital Technologies, Inc.
- Substrate for magnetic disk30 Jul 2026US 2026/0221155 A1Furukawa Electric Co., Ltd.
- Method for treatment of a glass substrate with improved edge strength18 Jun 2026US 2026/0167560 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
- Medium substrate, production method thereof and magnetic disk device121US 6,673,474 B2Fujitsu Limited · 2004
- Sheet glass flattening method, method of manufacturing glass substrate for an information recording disk using flattened glass, method of manufacturing a magnetic recording disk using glass substrate, and magnetic recording medium114US 5,654,057 AHoya Corporation · 1997
- Glass-ceramics for magnetic disc substrate, magnetic disc substrate and magnetic disc104US 5,872,069 ANGK Insulators, Ltd. · 1999