G11B 5/1875
"composite" pole pieces, i.e. poles composed in some parts of magnetic particles
Official title: {"Composite" pole pieces, i.e. poles composed in some parts of magnetic particles and in some other parts of magnetic metal layers}
G11B5/1875 ("composite" pole pieces, i.e. poles composed in some parts of magnetic particles) appears on 222 US grants and 50 published applications in this corpus.
Search patents in G11B- Granted patents
- 222
- Published applications
- 50
- Assignees
- 63
- Inventors
- 456
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 11 | 0 |
| 1992 | 11 | 0 |
| 1993 | 13 | 0 |
| 1994 | 7 | 0 |
| 1995 | 10 | 0 |
| 1996 | 12 | 0 |
| 1997 | 10 | 0 |
| 1998 | 18 | 0 |
| 1999 | 20 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 2 |
| 2002 | 2 | 3 |
| 2003 | 5 | 3 |
| 2004 | 4 | 5 |
| 2005 | 2 | 11 |
| 2006 | 10 | 4 |
| 2007 | 4 | 0 |
| 2008 | 4 | 0 |
| 2009 | 1 | 2 |
| 2010 | 3 | 0 |
| 2011 | 1 | 2 |
| 2012 | 2 | 1 |
| 2013 | 3 | 0 |
| 2014 | 3 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 5 | 1 |
| 2019 | 1 | 1 |
| 2020 | 6 | 2 |
| 2021 | 5 | 1 |
| 2022 | 3 | 1 |
| 2023 | 2 | 2 |
| 2024 | 2 | 3 |
| 2025 | 1 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Film and method for BiSbX (012) texture for SOT devices28 Jul 2026US 12,694,895 B2Western Digital Technologies, Inc.
- Writer having laterally decoupled pole sections5 May 2026US 12,620,411 B2International Business Machines Corporation
- Magnetic head with multilayer configuration between magnetic poles and magnetic recording device7 Jan 2025US 12,190,917 B2Kabushiki Kaisha Toshiba
- Magnetic disk device and method9 Apr 2024US 11,955,146 B2Kabushiki Kaisha Toshiba
- Heat-assisted magnetic recording (HAMR) head with main pole having recess for plasmonic material23 Jan 2024US 11,881,231 B2Western Digital Technologies, Inc.
- Writer having laterally decoupled pole sections23 Oct 2025US 2025/0329344 A1International Business Machines Corporation
- Film and Method for BiSbX (012) Texture for SOT Devices12 Dec 2024US 2024/0412759 A1Western Digital Technologies, Inc.
- Magnetic head with multilayer configuration between magnetic poles and magnetic recording device5 Sep 2024US 2024/0296861 A1Kabushiki Kaisha Toshiba
- Magnetic disk device and method8 Feb 2024US 2024/0046958 A1Kabushiki Kaisha Toshiba
- Magnetic head and magnetic recording/reproducing device3 Aug 2023US 2023/0245678 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Simultaneous amplification of multiple targets174US 5,422,252 ABecton, Dickinson and Company · 1995
- Method for manufacturing a perpendicular magnetic recording transducers157US 8,141,235 B1Western Digital (Fremont), LLC · 2012
- Laminated perpendicular writer head including amorphous metal154US 7,672,080 B1Western Digital (Fremont), LLC · 2010
- Method for manufacturing perpendicular magnetic recording transducers149US 8,468,682 B1Western Digital (Fremont), LLC · 2013
- Method for providing a perpendicular magnetic recording transducer using a low energy mill148US 8,458,892 B2Western Digital (Fremont), LLC · 2013