G11B 5/3176
Structure of heads comprising at least in the transducing gap regions two
Official title: {Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps (G11B5/2455, G11B5/265 take precedence)}
G11B5/3176 (Structure of heads comprising at least in the transducing gap regions two) appears on 189 US grants and 60 published applications in this corpus.
Search patents in G11B- Granted patents
- 189
- Published applications
- 60
- Assignees
- 60
- Inventors
- 252
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 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 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 16 | 0 |
| 1998 | 23 | 0 |
| 1999 | 17 | 0 |
| 2000 | 11 | 0 |
| 2001 | 10 | 4 |
| 2002 | 5 | 5 |
| 2003 | 5 | 6 |
| 2004 | 4 | 6 |
| 2005 | 3 | 8 |
| 2006 | 8 | 6 |
| 2007 | 6 | 2 |
| 2008 | 5 | 0 |
| 2009 | 1 | 3 |
| 2010 | 2 | 5 |
| 2011 | 3 | 1 |
| 2012 | 2 | 2 |
| 2013 | 2 | 2 |
| 2014 | 2 | 5 |
| 2015 | 4 | 1 |
| 2016 | 1 | 2 |
| 2017 | 3 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low friction planar servo writer head16 Jun 2026US 12,658,200 B2Western Digital Technologies, Inc.
- Main pole layer with at least two sacrificial layers and a gap layer20 Mar 2018US 9,922,671 B2Seagate Technology LLC
- Method of forming a non-uniform write gap perpendicular writer for shingle writing22 Aug 2017US 9,741,368 B2Headway Technologies, Inc.
- High frequency assisted magnetic recording head and disk device comprising the magnetic recording head13 Jun 2017US 9,679,587 B2Kabushiki Kaisha Toshiba
- Tape head with write pole having multiple layers superimposed in a direction perpendicular to the contact plane14 Feb 2017US 9,570,097 B1International Business Machines Corporation
- Low Friction Planar Servo Writer Head11 Dec 2025US 2025/0378846 A1Western Digital Technologies, Inc.
- Magnetic recording head and disk device comprising the magnetic recording head2 Mar 2017US 2017/0061995 A1Kabushiki Kaisha Toshiba
- Magnetic head with plural read elements having pinned layers magnetic disk device comprising the same and reading method using magnetic head16 Jun 2016US 2016/0171993 A1Kabushiki Kaisha Toshiba
- Main pole layer with at least two sacrificial layers and a gap layer17 Mar 2016US 2016/0078887 A1Seagate Technology LLC
- Non-Uniform Write Gap Perpendicular Writer for Shingle Writing26 Feb 2015US 2015/0055252 A1Headway Technologies, Inc.
Most cited
By later US patents
- Integrated conductor magnetic recording head and suspension having cross-over integrated circuits for noise reduction95US 5,805,382 AInternational Business Machines Corporation · 1998
- Planar structure thin film magnetic head84US 4,949,207 ACommissariat A L' Energie Atomique · 1990
- PMR writer device with multi-level tapered write pole76US 8,264,792 B2Headway Technologies, Inc. · 2012
- Process for the production of planar structure thin film magnetic heads74US 4,837,924 ACommissariat A L' Energie Atomique · 1989
- Arbitrary pattern write head assembly for writing timing-based servo patterns on magnetic storage media68US 5,572,392 AInternational Business Machines Corporation · 1996