G11B 5/7356
Comprising non-magnetic particles in the back layer
Official title: {comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2}
G11B5/7356 (Comprising non-magnetic particles in the back layer) appears on 327 US grants and 271 published applications in this corpus.
Search patents in G11B- Granted patents
- 327
- Published applications
- 271
- Assignees
- 36
- Inventors
- 395
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 14 | 0 |
| 1987 | 19 | 0 |
| 1988 | 15 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 2 |
| 2002 | 3 | 4 |
| 2003 | 4 | 11 |
| 2004 | 9 | 21 |
| 2005 | 7 | 9 |
| 2006 | 7 | 7 |
| 2007 | 2 | 6 |
| 2008 | 2 | 2 |
| 2009 | 2 | 1 |
| 2010 | 1 | 3 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 4 |
| 2017 | 3 | 8 |
| 2018 | 2 | 2 |
| 2019 | 5 | 6 |
| 2020 | 8 | 32 |
| 2021 | 15 | 46 |
| 2022 | 51 | 18 |
| 2023 | 12 | 33 |
| 2024 | 21 | 29 |
| 2025 | 31 | 12 |
| 2026 | 6 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus28 Apr 2026US 12,614,564 B2FUJIFILM Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus14 Apr 2026US 12,603,108 B2FUJIFILM Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus24 Feb 2026US 12,562,191 B2FUJIFILM Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus17 Feb 2026US 12,555,603 B2FUJIFILM Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus27 Jan 2026US 12,537,023 B2FUJIFILM Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus10 Sep 2026US 2026/0268933 A1FUJIFILM Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus10 Sep 2026US 2026/0268935 A1FUJIFILM Corporation
- Magnetic recording medium13 Aug 2026US 2026/0237402 A1Sony Group Corporation
- Magnetic recording medium6 Aug 2026US 2026/0229252 A1Sony Group Corporation
- Magnetic recording medium and cartridge30 Jul 2026US 2026/0221156 A1Sony Group Corporation
Most cited
By later US patents
- Magnetic recording medium132US 9,311,946 B2Hitachi Maxell, Ltd. · 2016
- Magnetic recording tape126US 6,228,461 B1Fuji Photo Film Co., Ltd. · 2001
- Magnetic tape and method of manufacturing the same123US 9,721,606 B2FUJIFILM Corporation · 2017
- Magnetic tape, its cleaning method, and optical servotrack forming/cleaning apparatus112US 7,803,471 B1Hitachi Maxell, Ltd. · 2010
- Magnetic recording medium comprising a magnetic layer having specific thickness, surface roughness and friction coefficient111US 6,921,592 B2Hitachi Maxell, Ltd. · 2005