G11B 5/66
The record carriers consisting of several layers
Official title: the record carriers consisting of several layers
G11B5/66 (The record carriers consisting of several layers) appears on 1,042 US grants and 1,071 published applications in this corpus.
Search patents in G11B- Granted patents
- 1,042
- Published applications
- 1,071
- Assignees
- 181
- Inventors
- 1,360
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 5 | 0 |
| 1984 | 0 | 0 |
| 1985 | 10 | 0 |
| 1986 | 9 | 0 |
| 1987 | 13 | 0 |
| 1988 | 10 | 0 |
| 1989 | 13 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 14 | 0 |
| 1997 | 11 | 0 |
| 1998 | 25 | 0 |
| 1999 | 16 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 17 |
| 2002 | 22 | 52 |
| 2003 | 52 | 67 |
| 2004 | 67 | 86 |
| 2005 | 50 | 93 |
| 2006 | 52 | 88 |
| 2007 | 42 | 70 |
| 2008 | 35 | 73 |
| 2009 | 56 | 81 |
| 2010 | 37 | 87 |
| 2011 | 57 | 44 |
| 2012 | 39 | 49 |
| 2013 | 49 | 36 |
| 2014 | 56 | 40 |
| 2015 | 57 | 41 |
| 2016 | 37 | 22 |
| 2017 | 32 | 18 |
| 2018 | 27 | 17 |
| 2019 | 14 | 9 |
| 2020 | 13 | 7 |
| 2021 | 13 | 11 |
| 2022 | 12 | 14 |
| 2023 | 13 | 15 |
| 2024 | 11 | 12 |
| 2025 | 13 | 12 |
| 2026 | 5 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Magnetic recording media with high magnetization absorption layer and gradient segregant structure22 Sep 2026US 12,744,059 B1Western Digital Technologies, Inc.
- Magnetic layer of a magnetic recording disk, and related magnetic recording disks28 Jul 2026US 12,694,900 B2Seagate Technology LLC
- Magnetic recording disk with high internal stress to reduce disk deflections from shock forces and methods for use with the disk17 Feb 2026US 12,555,601 B2Western Digital Technologies, Inc.
- Magnetic recording medium and magnetic storage apparatus20 Jan 2026US 12,531,087 B2Resonac Hard Disk Corporation
- Ultrafast pulse assisted magnetic recording6 Jan 2026US 12,518,786 B1Seagate Technology LLC
- Non-aligned exchange-de-coupled dual-layer system for increased areal-density8 Oct 2026US 2026/0311723 A1Seagate Technology LLC
- Magnetic recording and reproducing apparatus1 Oct 2026US 2026/0301767 A1Resonac Hard Disk Corporation
- Magnetic recording media with high magnetization absorption layer and gradient segregant structure24 Sep 2026US 2026/0290393 A1Western Digital Technologies, Inc.
- Magnetic recording medium with magnetic capping layer containing carbon and a magnetic recording apparatus for use therewith20 Aug 2026US 2026/0245586 A1Western Digital Technologies, Inc.
- Magnetic recording medium with amorphous metallic alloy overcoat and magnetic recording apparatus for use therewith6 Aug 2026US 2026/0229251 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Magnetic recording media and magnetic recording read-back system which uses such media113US 5,851,643 AHitachi, Ltd. · 1998
- Perpendicular magnetic discrete track recording disk111US 7,147,790 B2Komag, Inc. · 2006
- Magnetic recording media with antiferromagnetically coupled ferromagnetic films as the recording layer110US 6,280,813 B1International Business Machines Corporation · 2001
- Magnetic recording medium110US 9,542,967 B2Sony Corporation · 2017
- Magnetic recording disk with composite perpendicular recording layer99US 6,468,670 B1International Business Machines Corporation · 2002