G11B 5/23
Gap features
Official title: Gap features {(G11B5/1871, G11B5/1875, G11B5/265, G11B5/29, G11B5/488 and subgroups, G11B5/4907 and subgroups, G11B5/4969 and subgroups take precedence)}
G11B5/23 (Gap features) appears on 672 US grants and 384 published applications in this corpus.
Search patents in G11B- Granted patents
- 672
- Published applications
- 384
- Assignees
- 110
- Inventors
- 831
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 8 | 0 |
| 1989 | 13 | 0 |
| 1990 | 7 | 0 |
| 1991 | 12 | 0 |
| 1992 | 9 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 12 | 0 |
| 1997 | 12 | 0 |
| 1998 | 28 | 0 |
| 1999 | 16 | 0 |
| 2000 | 13 | 0 |
| 2001 | 15 | 8 |
| 2002 | 11 | 11 |
| 2003 | 9 | 6 |
| 2004 | 17 | 20 |
| 2005 | 8 | 8 |
| 2006 | 15 | 10 |
| 2007 | 8 | 6 |
| 2008 | 6 | 9 |
| 2009 | 10 | 8 |
| 2010 | 3 | 4 |
| 2011 | 8 | 11 |
| 2012 | 10 | 12 |
| 2013 | 20 | 16 |
| 2014 | 26 | 24 |
| 2015 | 38 | 25 |
| 2016 | 37 | 14 |
| 2017 | 31 | 19 |
| 2018 | 25 | 19 |
| 2019 | 19 | 19 |
| 2020 | 37 | 24 |
| 2021 | 31 | 21 |
| 2022 | 26 | 21 |
| 2023 | 29 | 18 |
| 2024 | 19 | 27 |
| 2025 | 20 | 15 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Writer with patterned hot seed layer15 Sep 2026US 12,738,293 B2Headway Technologies, Inc.
- Magnetic flux guiding device with spin torque oscillator (STO) film having negative spin polarization layers in assisted writing application8 Sep 2026US 12,731,605 B2Headway Technologies, Inc.
- Perpendicular magnetic recording writer with tunable pole side bridge design11 Aug 2026US 12,706,113 B2Headway Technologies, Inc.
- Dual FGL and dual SPL spintronic device to reduce perpendicular field at writing location4 Aug 2026US 12,700,424 B2Western Digital Technoloies, Inc.
- Servo pattern recording head, servo pattern recording device, magnetic tape, magnetic tape cartridge, magnetic tape drive, magnetic tape system, and manufacturing method of magnetic tape9 Jun 2026US 12,651,609 B2FUJIFILM Corporation
- Perpendicular Magnetic Recording Head Equipping A Spin Torque Oscillator Element With An Electric Current In Side Gaps9 Jul 2026US 2026/0196242 A1Headway Technologies, Inc.
- Pre-Assisting Microwave-Assisted Magnetic Recording With Spin-Torque Nano-Oscillators18 Jun 2026US 2026/0171111 A1Headway Technologies, Inc.
- Asymmetric Side Gap Writer Fabricated By Ion-Beam Etching (IBE) / Ion-Beam Deposition (IBD) Process For Aerial Density Capability (ADC) Improvement28 May 2026US 2026/0148749 A1Headway Technologies, Inc.
- Magnetic Recording Writer With Improved Side Shield14 May 2026US 2026/0134881 A1Headway Technologies, Inc.
- Triangular-Shaped Main Pole Design With Natural Leading Edge Tapering For Maximizing The Aerial Density Capacity In Perpendicular Magnetic Recording30 Apr 2026US 2026/0120714 A1Headway Technologies, Inc.
Most cited
By later US patents
- Inductive transducer with recessed leading pole layer184US 6,724,572 B1Western Digital Corporation · 2004
- Perpendicular recording head with shaped pole surfaces for higher linear data densities170US 7,869,160 B1Western Digital (Fremont), LLC · 2011
- Systems and methods for providing a pole pedestal for microwave assisted magnetic recording170US 8,456,967 B1Western Digital (Fremont), LLC · 2013
- Conformal high moment side shield seed layer for perpendicular magnetic recording writer165US 8,724,259 B1Western Digital (Fremont), LLC · 2014
- Method of fabricating a perpendicular recording write head having a gap with two portions160US 7,248,431 B12007