G11B 5/733
Characterised by the addition of non-magnetic particles
Official title: characterised by the addition of non-magnetic particles {(base layers having a non-magnetic layer under a soft magnetic layer G11B5/736; magnetic recording media substrates G11B5/739)}
G11B5/733 (Characterised by the addition of non-magnetic particles) appears on 369 US grants and 287 published applications in this corpus.
Search patents in G11B- Granted patents
- 369
- Published applications
- 287
- Assignees
- 53
- Inventors
- 474
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 8 | 0 |
| 1995 | 13 | 0 |
| 1996 | 15 | 0 |
| 1997 | 17 | 0 |
| 1998 | 25 | 0 |
| 1999 | 15 | 0 |
| 2000 | 28 | 0 |
| 2001 | 18 | 6 |
| 2002 | 13 | 17 |
| 2003 | 12 | 15 |
| 2004 | 19 | 27 |
| 2005 | 9 | 35 |
| 2006 | 8 | 20 |
| 2007 | 16 | 24 |
| 2008 | 12 | 11 |
| 2009 | 8 | 8 |
| 2010 | 3 | 7 |
| 2011 | 3 | 5 |
| 2012 | 0 | 4 |
| 2013 | 5 | 2 |
| 2014 | 0 | 5 |
| 2015 | 2 | 1 |
| 2016 | 2 | 7 |
| 2017 | 6 | 6 |
| 2018 | 1 | 2 |
| 2019 | 3 | 4 |
| 2020 | 7 | 29 |
| 2021 | 10 | 26 |
| 2022 | 42 | 5 |
| 2023 | 7 | 8 |
| 2024 | 8 | 5 |
| 2025 | 6 | 4 |
| 2026 | 1 | 4 |
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 apparatus27 Jan 2026US 12,537,023 B2FUJIFILM Corporation
- Magnetic recording medium and cartridge4 Nov 2025US 12,462,840 B2Sony Group Corporation
- Magnetic tape having characterized bright regions on magnetic layer, magnetic tape cartridge, and magnetic tape apparatus23 Sep 2025US 12,424,245 B2FUJIFILM Corporation
- Magnetic recording medium and cartridge16 Sep 2025US 12,417,784 B2Sony Group Corporation
- Magnetic recording medium19 Aug 2025US 12,394,436 B2Sony 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 cartridge23 Jul 2026US 2026/0212886 A1Sony Group Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus13 Nov 2025US 2025/0349318 A1FUJIFILM Corporation
Most cited
By later US patents
- Magnetic recording medium and method for producing the same168US 5,474,814 AFuji Photo Film Co., Ltd. · 1995
- Magnetic recording medium136US 5,496,607 AFuji Photo Film Co., Ltd. · 1996
- Magnetic recording medium136US 5,645,917 AFuji Photo Film Co., Ltd. · 1997
- Magnetic recording medium132US 9,311,946 B2Hitachi Maxell, Ltd. · 2016
- Magnetic recording tape126US 6,228,461 B1Fuji Photo Film Co., Ltd. · 2001