G11B 23/0021
Discs
Official title: {discs}
G11B23/0021 (Discs) appears on 809 US grants and 442 published applications in this corpus.
Search patents in G11B- Granted patents
- 809
- Published applications
- 442
- Assignees
- 278
- Inventors
- 1,405
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 0 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 14 | 0 |
| 1985 | 26 | 0 |
| 1986 | 27 | 0 |
| 1987 | 26 | 0 |
| 1988 | 25 | 0 |
| 1989 | 49 | 0 |
| 1990 | 22 | 0 |
| 1991 | 20 | 0 |
| 1992 | 9 | 0 |
| 1993 | 18 | 0 |
| 1994 | 14 | 0 |
| 1995 | 12 | 0 |
| 1996 | 17 | 0 |
| 1997 | 12 | 0 |
| 1998 | 28 | 0 |
| 1999 | 35 | 0 |
| 2000 | 46 | 0 |
| 2001 | 52 | 19 |
| 2002 | 36 | 57 |
| 2003 | 33 | 48 |
| 2004 | 33 | 48 |
| 2005 | 24 | 63 |
| 2006 | 29 | 52 |
| 2007 | 30 | 37 |
| 2008 | 25 | 45 |
| 2009 | 26 | 22 |
| 2010 | 27 | 15 |
| 2011 | 18 | 12 |
| 2012 | 10 | 4 |
| 2013 | 17 | 7 |
| 2014 | 6 | 3 |
| 2015 | 7 | 3 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 2 | 2 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Edge profiled media substrate3 Feb 2026US 12,542,158 B1Seagate Technology LLC
- Tuned edge profile of a disk substrate for use in magnetic recording media30 May 2023US 11,664,050 B2Western Digital Technologies, Inc.
- Method of laser cutting a hard disk drive substrate for an edge profile alignable to a registration support21 Jun 2022US 11,367,462 B1Seagate Technology LLC
- Nesting disk separator plates for use in hard disk drives16 Apr 2019US 10,262,689 B2Intri-Plex Technologies, Inc.
- Disc tray and tray holder14 Aug 2018US 10,049,699 B2Panasonic Intellecutal Property Management Co., Ltd.
- Production pallet control system and production pallet control method12 Sep 2024US 2024/0304217 A1Kabushiki Kaisha Toshiba
- 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 device16 May 2024US 2024/0158281 A1Hoya Corporation
- Tuned edge profile of a disk substrate for use in magnetic recording media6 Apr 2023US 2023/0104944 A1Western Digital Technologies, Inc.
- Connected recording medium disc12 Dec 2019US 2019/0378538 A1MPO International
- Diffused center gas injection cooling plate for media cooling22 Nov 2018US 2018/0334743 A1
Most cited
By later US patents
- Etch stop for copper damascene process211US 5,693,563 AChartered Semiconductor Manufacturing Pte Ltd. · 1997
- Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk167US 5,761,301 AMatsushita Electric Industrial Co., Ltd. · 1998
- Tiris based bios for protection of “copyrighted” program material138US 6,198,875 B1Texas Instruments Incorporated · 2001
- Optical disc having RFID tag, optical disc apparatus, and system for preventing unauthorized copying137US 7,317,396 B2Funai Electric Co., Ltd. · 2008
- Radio tag antenna structure for an optical recording medium and a case for an optical recording medium with a radio tag antenna134US 7,248,221 B2Fujitsu Limited · 2007