H01F 13/00
Apparatus or processes for magnetising or demagnetising
Official title: Apparatus or processes for magnetising or demagnetising ({devices for holding workpieces using magnetic or electric force acting directly on the workpieces B23Q3/15} ; for degaussing ships B63G9/06; for clocks or watches G04D9/00; {recording or erasing of information on magnetic record carriers G11B5/00} ; demagnetising arrangements for colour television H04N9/29)
H01F13/00 (Apparatus or processes for magnetising or demagnetising) appears on 684 US grants and 603 published applications in this corpus.
Search patents in H01F- Granted patents
- 684
- Published applications
- 603
- Assignees
- 418
- Inventors
- 1,425
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 14 | 0 |
| 1978 | 13 | 0 |
| 1979 | 11 | 0 |
| 1980 | 8 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 11 | 0 |
| 1984 | 9 | 0 |
| 1985 | 5 | 0 |
| 1986 | 11 | 0 |
| 1987 | 9 | 0 |
| 1988 | 11 | 0 |
| 1989 | 10 | 0 |
| 1990 | 3 | 0 |
| 1991 | 8 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 13 | 0 |
| 2000 | 17 | 0 |
| 2001 | 7 | 1 |
| 2002 | 6 | 17 |
| 2003 | 15 | 12 |
| 2004 | 16 | 21 |
| 2005 | 13 | 21 |
| 2006 | 21 | 23 |
| 2007 | 12 | 13 |
| 2008 | 9 | 29 |
| 2009 | 11 | 19 |
| 2010 | 16 | 12 |
| 2011 | 14 | 22 |
| 2012 | 16 | 13 |
| 2013 | 22 | 20 |
| 2014 | 17 | 29 |
| 2015 | 24 | 36 |
| 2016 | 18 | 23 |
| 2017 | 23 | 35 |
| 2018 | 20 | 29 |
| 2019 | 20 | 25 |
| 2020 | 35 | 32 |
| 2021 | 18 | 23 |
| 2022 | 28 | 41 |
| 2023 | 26 | 26 |
| 2024 | 24 | 28 |
| 2025 | 25 | 30 |
| 2026 | 16 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of manufacturing permanent magnets6 Oct 2026US 12,755,879 B2
- Magnetic field nulling6 Oct 2026US 12,755,881 B2Shimadzu Corporation
- Magnetization method and magnetization apparatus6 Oct 2026US 12,755,884 B2Toyota Jidosha Kabushiki Kaisha
- Rotor, motor, and rotor manufacturing method1 Sep 2026US 12,726,061 B2Kawasaki Jukogyo Kabushiki Kaisha
- Apparatus for manufacturing rotor18 Aug 2026US 12,712,107 B2Denso Corporation
- Magnetic miniature robots24 Sep 2026US 2026/0284869 A1Nanyang Technological University
- Permanent magnet motor demagnetization testing station10 Sep 2026US 2026/0266932 A1GM Global Technology Operations LLC
- Magnet module, sensor module, and method for manufacturing magnet module10 Sep 2026US 2026/0269114 A1Panasonic Intellectual Property Management Co., Ltd.
- Magnetic clamping device20 Aug 2026US 2026/0241625 A1Kosmek Ltd.
- Demagnetization of working-channel tools in an electromagnetically tracked endoscope30 Jul 2026US 2026/0221326 A1Magnisity Ltd.
Most cited
By later US patents
- Magnets with varying magnetization direction and method of making such magnets134US 6,940,379 B2Stereotaxis, Inc. · 2005
- Magnetic pole layout method and a magnetizing device for double-wing opposite attraction soft magnet and a product thereof126US 6,927,657 B12005
- Methods and apparatus for magnetic field shimming115US 10,145,913 B2Hyperfine Research, Inc. · 2018
- Magnetically enhanced convection heat sink107US 7,031,160 B2The Boeing Company · 2006
- Position encoder using saturable reactor interacting with magnetic fields varying with time and with position104US 6,118,271 AScientific Generics Limited · 2000