G11B 5/455
Arrangements for functional testing of heads
Official title: Arrangements for functional testing of heads; Measuring arrangements for heads
G11B5/455 (Arrangements for functional testing of heads) appears on 986 US grants and 692 published applications in this corpus.
Search patents in G11B- Granted patents
- 986
- Published applications
- 692
- Assignees
- 160
- Inventors
- 1,885
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 10 | 0 |
| 1996 | 10 | 0 |
| 1997 | 17 | 0 |
| 1998 | 23 | 0 |
| 1999 | 27 | 0 |
| 2000 | 35 | 0 |
| 2001 | 23 | 13 |
| 2002 | 38 | 27 |
| 2003 | 36 | 38 |
| 2004 | 38 | 37 |
| 2005 | 21 | 37 |
| 2006 | 59 | 59 |
| 2007 | 38 | 56 |
| 2008 | 27 | 72 |
| 2009 | 47 | 74 |
| 2010 | 44 | 47 |
| 2011 | 57 | 23 |
| 2012 | 45 | 37 |
| 2013 | 38 | 20 |
| 2014 | 49 | 23 |
| 2015 | 58 | 25 |
| 2016 | 43 | 22 |
| 2017 | 50 | 21 |
| 2018 | 39 | 10 |
| 2019 | 21 | 11 |
| 2020 | 17 | 13 |
| 2021 | 14 | 5 |
| 2022 | 12 | 5 |
| 2023 | 4 | 6 |
| 2024 | 8 | 3 |
| 2025 | 5 | 4 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High speed head fault detection circuit with programmable current mirror16 Jun 2026US 12,658,202 B1STMicroelectronics International N. V.
- Laser power monitoring in hard disk drives16 Jun 2026US 12,658,210 B1Avago Technologies International Sales Pte. Limited
- NFT back reflection monitor for heat-assisted magnetic recording head21 Apr 2026US 12,609,137 B1Seagate Technology LLC
- Oxygen partial pressure regulation by use of organic oxygen-buffering materials such as transition metal salens in hermetically sealed electronic devices environment and related assemblies and methods17 Mar 2026US 12,580,006 B2Western Digital Technologies, Inc.
- Preamplifier, disk device, control device, and analysis method30 Dec 2025US 12,512,121 B2Kabushiki Kaisha Toshiba
- Magnetic recording and reproduction device and control method of the same24 Sep 2026US 2026/0290386 A1Kabushiki Kaisha Toshiba
- High speed head fault detection circuit with programmable current mirror24 Sep 2026US 2026/0290387 A1STMicroelectronics International N. V.
- Magnetic recording device18 Jun 2026US 2026/0171115 A1Kabushiki Kaisha Toshiba
- Oxygen partial pressure regulation by use of organic oxygen-buffering materials such as transition metal salens in hermetically sealed electronic devices environment and related assemblies and methods1 Jan 2026US 2026/0004818 A1Western Digital Technologies, Inc.
- Preamplifier, disk device, control device, and analysis method11 Dec 2025US 2025/0378848 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Differential head integrated touchdown sensors for hard disk drives207US 7,800,858 B1Western Digital (Fremont), LLC · 2010
- Thin film write head for improved high speed and high density recording187US 6,353,511 B1Read-Rite Corporation · 2002
- Shorting bar and test clip for protecting magnetic heads from damage caused by electrostatic discharge during manufacture186US 6,034,851 ARead-Rite Corporation · 2000
- Simultaneous amplification of multiple targets174US 5,422,252 ABecton, Dickinson and Company · 1995
- Method for determining a microactuator range of movement169US 7,124,654 B1Western Digital (Fremont), LLC · 2006