H01F 1/0302
Characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness
Official title: {characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions}
H01F1/0302 (Characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness) appears on 254 US grants and 234 published applications in this corpus.
Search patents in H01F- Granted patents
- 254
- Published applications
- 234
- Assignees
- 181
- Inventors
- 714
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 9 | 0 |
| 1999 | 9 | 0 |
| 2000 | 7 | 0 |
| 2001 | 11 | 1 |
| 2002 | 7 | 6 |
| 2003 | 3 | 2 |
| 2004 | 1 | 4 |
| 2005 | 2 | 3 |
| 2006 | 1 | 3 |
| 2007 | 4 | 2 |
| 2008 | 2 | 3 |
| 2009 | 0 | 2 |
| 2010 | 4 | 3 |
| 2011 | 3 | 3 |
| 2012 | 3 | 1 |
| 2013 | 5 | 10 |
| 2014 | 1 | 9 |
| 2015 | 5 | 10 |
| 2016 | 11 | 24 |
| 2017 | 16 | 38 |
| 2018 | 18 | 20 |
| 2019 | 30 | 23 |
| 2020 | 16 | 16 |
| 2021 | 14 | 9 |
| 2022 | 10 | 6 |
| 2023 | 11 | 10 |
| 2024 | 7 | 7 |
| 2025 | 4 | 11 |
| 2026 | 1 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Stylus pen10 Mar 2026US 12,572,226 B2HiDeep Inc.
- Magnetic microcapsule, preparation method thereof, and magnetic film22 Jul 2025US 12,367,994 B1My Superboard Limited
- Magnetic core with hard ferromagnetic biasing layers and structures containing same3 Jun 2025US 12,322,695 B2Ferric Inc.
- Color and symbol coded display on a digital badge for communicating permission to approach and activate further digital content interaction22 Apr 2025US 12,279,873 B2
- Ferromagnetic-polymer composite material and structures comprising same11 Feb 2025US 12,224,091 B2Ferric Inc.
- Coil component and method for manufacturing the coil component1 Oct 2026US 2026/0302051 A1Taiyo Yuden Co., Ltd.
- Composite permanent magnet material and magnet-free magnetic false eyelash17 Sep 2026US 2026/0272088 A1Qingdao Yiernuo Arts and Crafts Import & Export Co., Ltd.
- Magnetic Bead And Method For Producing Magnetic Bead10 Sep 2026US 2026/0269111 A1Seiko Epson Corporation
- Stylus pen16 Jul 2026US 2026/0202924 A1HiDeep Inc.
- Magnetic component2 Jul 2026US 2026/0188558 A1Samsung Electro-Mechanics Co., Ltd.
Most cited
By later US patents
- Magnetically coded device145US 5,631,093 AGeneral Motors Corporation · 1997
- Method of riveting104US 6,467,326 B1The Boeing Company · 2002
- Method for thermomagnetic encoding of permanent magnet materials79US 5,492,572 AGeneral Motors Corporation · 1996
- Magnetic memory having shape anisotropic magnetic elements46US 5,989,406 ANanoSciences Corporation · 1999
- Method of stress inducing transformation of austenite stainless steel and method of producing composite magnetic members43US 6,949,148 B2Denso Corporation · 2005