G11B 5/133
With cores composed of particles
Official title: with cores composed of particles, e.g. with dust cores, with ferrite cores {with cores composed of isolated magnetic particles (in thin films G11B5/31)}
G11B5/133 (With cores composed of particles) appears on 110 US grants and 11 published applications in this corpus.
Search patents in G11B- Granted patents
- 110
- Published applications
- 11
- Assignees
- 42
- Inventors
- 222
- Latest grant
- 12 Apr 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 2 | 2 |
| 2004 | 3 | 0 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
| 2020 | 3 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Magnetic recording medium having controlled dimensional variation12 Apr 2022US 11,302,355 B2Sony Corporation
- Magnetic recording medium having a dimensional variation and cartridge13 Apr 2021US 10,978,104 B2Sony Corporation
- Shape designs of magnetic flux guiding devices all around the main pole in assisted writing applications10 Nov 2020US 10,832,707 B1Headway Technologies, Inc.
- Shape designs of magnetic flux guiding devices all around the main pole in assisted writing applications14 Jul 2020US 10,714,127 B1Headway Technologies, Inc.
- Selectable magnetic writers of different target geometries for reducing performance variance11 Feb 2020US 10,559,319 B2Seagate Technology LLC
- Magnetic recording medium20 May 2021US 2021/0151075 A1Sony Corporation
- Magnetic recording medium and cartridge12 Nov 2020US 2020/0357434 A1Sony Corporation
- Selectable writers for reduced performance variance, and selection method thereof18 Jul 2019US 2019/0221229 A1Seagate Technology LLC
- Selectable writers for reduced performance variance, and selection method thereof22 Mar 2018US 2018/0082714 A1Seagate Technology LLC
- Electromagnetic data storage devices13 Oct 2016US 2016/0300588 A1Peacekeeper (International) Ltd.
Most cited
By later US patents
- Method and system for providing a magnetic head using a composite magnetic material in the recording transducer150US 8,259,410 B1Western Digital (Fremont), LLC · 2012
- In situ use of gelatin or an aminodextran in the preparation of uniform ferrite particles43US 5,240,640 ACoulter Corporation · 1993
- Magnetic head assembly with ferrite core34US 4,298,899 AInternational Business Machines Corporation · 1981
- Non-magnetic part in magnetic head assembly34US 4,667,259 AHitachi Metals, Ltd. · 1987
- Magnetic sintered composite material33US 5,350,628 AMatsushita Electric Industrial Co., Ltd. · 1994