G11B 5/193
The pole pieces being ferrite or other magnetic particles
Official title: the pole pieces being ferrite {or other magnetic particles (G11B5/1871 takes precedence; in thin film G11B5/31)}
G11B5/193 (The pole pieces being ferrite or other magnetic particles) appears on 96 US grants and 19 published applications in this corpus.
Search patents in G11B- Granted patents
- 96
- Published applications
- 19
- Assignees
- 39
- Inventors
- 194
- Latest grant
- 23 Jan 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 3 | 0 |
| 1991 | 11 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 0 |
| 2013 | 2 | 2 |
| 2014 | 1 | 2 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 2 |
| 2021 | 3 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Magnetic head and magnetic recording device23 Jan 2024US 11,881,234 B2Kabushiki Kaisha Toshiba
- Magnetic head and magnetic recording device having magnetic layers and nonmagnetic layers between shield and magnetic pole4 Oct 2022US 11,462,239 B2Kabushiki Kaisha Toshiba
- Magnetic head and magnetic recording device19 Jul 2022US 11,393,493 B1Kabushiki Kaisha Toshiba
- Magnetic head and magnetic recording device having magnetic layers and non-magnetic layers between shield and magnetic pole5 Oct 2021US 11,138,994 B2Kabushiki Kaisha Toshiba
- Spin transfer torque oscillator (STO) with spin torque injection to a flux generating layer (FGL) from two sides22 Jun 2021US 11,043,234 B2Headway Technologies, Inc.
- Magnetic head and magnetic recording device8 Jun 2023US 2023/0178102 A1Kabushiki Kaisha Toshiba
- Magnetic head and magnetic recording device2 Dec 2021US 2021/0375308 A1Kabushiki Kaisha Toshiba
- Spin Transfer Torque Oscillator (STO) with Spin Torque Injection to a Flux Generating Layer (FGL) from Two Sides25 Feb 2021US 2021/0056987 A1Headway Technologies, Inc.
- Magnetic head and magnetic recording device17 Sep 2020US 2020/0294537 A1Kabushiki Kaisha Toshiba
- Magnetic head and magnetic recording and reproducing device5 Mar 2020US 2020/0075045 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Hybrid diffuser for minimizing thermal pole tip protrusion and reader sensor temperature173US 6,859,343 B1Western Digital Corporation · 2005
- Low inductance, ferrite sub-gap substrate structure for surface film magnetic recording heads139US 6,496,328 B1Advanced Research Corporation · 2002
- Magnetic head assembly with ferrite core34US 4,298,899 AInternational Business Machines Corporation · 1981
- Magnetic sintered composite material33US 5,350,628 AMatsushita Electric Industrial Co., Ltd. · 1994
- Magnetic material23US 5,238,507 AMatsushita Electric Industrial Co., Ltd. · 1993