G11B 5/312
For reducing flux leakage between the electrical coil layers and the magnetic
Official title: {for reducing flux leakage between the electrical coil layers and the magnetic cores or poles or between the magnetic cores or poles}
G11B5/312 (For reducing flux leakage between the electrical coil layers and the magnetic) appears on 299 US grants and 204 published applications in this corpus.
Search patents in G11B- Granted patents
- 299
- Published applications
- 204
- Assignees
- 49
- Inventors
- 432
- Latest grant
- 19 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 7 |
| 2002 | 7 | 7 |
| 2003 | 10 | 6 |
| 2004 | 15 | 12 |
| 2005 | 3 | 9 |
| 2006 | 5 | 8 |
| 2007 | 9 | 16 |
| 2008 | 10 | 27 |
| 2009 | 12 | 19 |
| 2010 | 17 | 18 |
| 2011 | 19 | 4 |
| 2012 | 19 | 12 |
| 2013 | 28 | 14 |
| 2014 | 23 | 12 |
| 2015 | 26 | 5 |
| 2016 | 12 | 7 |
| 2017 | 13 | 8 |
| 2018 | 5 | 2 |
| 2019 | 6 | 3 |
| 2020 | 7 | 4 |
| 2021 | 5 | 3 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 3 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- HDD head having same gap verify and system for using same19 Nov 2024US 12,148,447 B1Western Digital Technologies, Inc.
- Recording head with a multilayer spin torque element having positive and negative beta materials17 Sep 2024US 12,094,498 B1Western Digital Technologies, Inc.
- Magnetic recording head with an SOT device coupled with side shield6 Aug 2024US 12,057,146 B1Western Digital Technologies, Inc.
- Writer with narrower high moment trailing shield7 Jun 2022US 11,355,141 B2Headway Technologies, Inc.
- Magnetic disk device and write processing method30 Nov 2021US 11,189,305 B2Kabushiki Kaisha Toshiba
- HDD Head Having Same Gap Verify And System For Using Same14 Nov 2024US 2024/0379125 A1Western Digital Technologies, Inc.
- Magnetic disk device and write processing method3 Jun 2021US 2021/0166725 A1Kabushiki Kaisha Toshiba
- Write transducer with symmetric yoke structure13 May 2021US 2021/0142822 A1International Business Machines Corporation
- Writer with Narrower High Moment Trailing Shield25 Mar 2021US 2021/0090594 A1Headway Technologies, Inc.
- Magnetic recording devices and methods using a write-field-enhancement structure and bias current with offset pulses5 Nov 2020US 2020/0349967 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Merged write head with magnetically isolated poletip167US 6,404,601 B1Read-Rite Corporation · 2002
- Magnetic read/write device with insulated coil layer recessed into pole165US 6,466,404 B1Read-Rite Corporation · 2002
- Magnetic head for perpendicular recording with hard bias structure for write pole tip163US 7,199,975 B1Western Digital (Fremont), LLC · 2007
- Magnetic read/write device with insulated coil layer recessed into pole162US 6,349,014 B1Read-Rite Corporation · 2002
- System for providing a transducer having a main coil and an additional coil separated from the main pole by a write shield162US 8,547,659 B1Western Digital (Fremont), LLC · 2013