G11B 5/245
Comprising means for controlling the reluctance of the magnetic circuit in a
Official title: comprising means for controlling the reluctance of the magnetic circuit {in a head with single gap, for co-operation with one track} (G11B5/255 takes precedence)
G11B5/245 (Comprising means for controlling the reluctance of the magnetic circuit in a) appears on 111 US grants and 27 published applications in this corpus.
Search patents in G11B- Granted patents
- 111
- Published applications
- 27
- Assignees
- 43
- Inventors
- 164
- Latest grant
- 7 Nov 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 11 | 0 |
| 1993 | 7 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 4 |
| 2003 | 2 | 3 |
| 2004 | 7 | 6 |
| 2005 | 1 | 1 |
| 2006 | 3 | 2 |
| 2007 | 1 | 0 |
| 2008 | 3 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 2 |
| 2021 | 6 | 1 |
| 2022 | 3 | 2 |
| 2023 | 3 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Magnetic head including multiple magnetic layers and magnetic recording device7 Nov 2023US 11,810,601 B2Kabushiki Kaisha Toshiba
- Magnetic recording device and magnetic recording method utilizing assisted magnetic recording31 Jan 2023US 11,568,890 B2Kabushiki Kaisha Toshiba
- Energy assisted magnetic recording head having improved areal density capability17 Jan 2023US 11,557,315 B2Western Digital Technologies, Inc.
- Magnetic head and magnetic recording device with stacked body material configurations6 Sep 2022US 11,437,059 B2Kabushiki Kaisha Toshiba
- Dual wire assisted magnetic recording24 May 2022US 11,341,990 B1Seagate Technology LLC
- Magnetic head and magnetic recording device2 Feb 2023US 2023/0031273 A1Kabushiki Kaisha Toshiba
- Magnetic recording device and magnetic recording method19 May 2022US 2022/0157336 A1Kabushiki Kaisha Toshiba
- Energy Assisted Magnetic Recording Head Having Improved Areal Density Capability7 Apr 2022US 2022/0108715 A1Western Digital Technologies, Inc.
- Magnetic head and magnetic recording device13 May 2021US 2021/0142821 A1Kabushiki Kaisha Toshiba
- Magnetic recording and reading apparatus and magnetic recording method4 Jun 2020US 2020/0176020 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Long saturation zone magnetic write head56US 5,801,910 AQuantum Corporation · 1998
- Three-pole magnetic recording head55US 4,907,113 ADigital Equipment Corporation · 1990
- Planar thin film magnetic head45US 5,274,521 ASony Corporation · 1993
- Three-pole magnetic head with reduced flux leakage44US 5,111,352 ADigital Equipment Corporation · 1992
- Thermo-magnetic recording head34US 5,025,341 AThomson-CSF · 1991