G11B 5/29
Structure or manufacture of unitary devices formed of plural heads for more
Official title: Structure or manufacture of unitary devices formed of plural heads for more than one track {(G11B5/33, G11B5/49 and subgroups take precedence; in thin film structure G11B5/31)}
G11B5/29 (Structure or manufacture of unitary devices formed of plural heads for more) appears on 364 US grants and 210 published applications in this corpus.
Search patents in G11B- Granted patents
- 364
- Published applications
- 210
- Assignees
- 86
- Inventors
- 445
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 10 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 7 | 0 |
| 1989 | 4 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 6 | 3 |
| 2002 | 4 | 5 |
| 2003 | 6 | 4 |
| 2004 | 4 | 8 |
| 2005 | 4 | 15 |
| 2006 | 10 | 8 |
| 2007 | 4 | 7 |
| 2008 | 9 | 10 |
| 2009 | 6 | 10 |
| 2010 | 7 | 7 |
| 2011 | 7 | 3 |
| 2012 | 6 | 5 |
| 2013 | 6 | 7 |
| 2014 | 10 | 11 |
| 2015 | 10 | 10 |
| 2016 | 21 | 20 |
| 2017 | 17 | 7 |
| 2018 | 20 | 17 |
| 2019 | 12 | 12 |
| 2020 | 21 | 11 |
| 2021 | 14 | 5 |
| 2022 | 3 | 3 |
| 2023 | 6 | 6 |
| 2024 | 2 | 4 |
| 2025 | 6 | 8 |
| 2026 | 7 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Servo recording apparatus, servo write head, method of producing a magnetic tape, and magnetic tape6 Oct 2026US 12,755,759 B2Sony Group Corporation
- Multichannel linear magnetic tape drive having dual tilting actuators4 Aug 2026US 12,700,426 B1Western Digital Technologies, 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
- Tape head module having a congruent extension and method for mass producing same12 May 2026US 12,626,720 B2Western Digital Technologies, Inc.
- Data storage device comprising dual channel preamp circuit21 Apr 2026US RE50,873 E1Western Digital Technologies, Inc.
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus27 Aug 2026US 2026/0253611 A1FUJIFILM Corporation
- Tape Head Module Having a Congruent Extension and Method for Mass Producing Same20 Aug 2026US 2026/0245584 A1Western Digital Technologies, Inc.
- Data storage device comprising dual channel preamp circuit16 Jul 2026US 2026/0204287 A1Western Digital Technologies, Inc.
- Multi-Format Data Retrieval From Legacy Tapes22 Jan 2026US 2026/0024548 A1ChannelScience, LLC
- Magnetic head, magnetic tape, magnetic tape cartridge, magnetic tape drive, and magnetic tape system13 Nov 2025US 2025/0349316 A1FUJIFILM Corporation
Most cited
By later US patents
- Tape head with support bars162US 6,611,398 B1Quantum Corporation · 2003
- Low inductance, ferrite sub-gap substrate structure for surface film magnetic recording heads139US 6,496,328 B1Advanced Research Corporation · 2002
- Magnetic structure and magnetic head using the same58US 5,883,760 AMitsubishi Denki Kabushiki Kaisha · 1999
- Magnetic transducer head assembly with support system therefor57US 4,642,716 ASony Corporation · 1987
- Fully integrated matrix magnetic recording head with independent control55US 6,650,496 B2Phs Mems · 2003