H01F 1/032
Of hard-magnetic materials
Official title: of hard-magnetic materials
H01F1/032 (Of hard-magnetic materials) appears on 3,051 US grants and 3,005 published applications in this corpus.
Search patents in H01F- Granted patents
- 3,051
- Published applications
- 3,005
- Assignees
- 954
- Inventors
- 5,352
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 39 | 0 |
| 1977 | 27 | 0 |
| 1978 | 30 | 0 |
| 1979 | 22 | 0 |
| 1980 | 21 | 0 |
| 1981 | 36 | 0 |
| 1982 | 33 | 0 |
| 1983 | 32 | 0 |
| 1984 | 26 | 0 |
| 1985 | 21 | 0 |
| 1986 | 25 | 0 |
| 1987 | 23 | 0 |
| 1988 | 33 | 0 |
| 1989 | 62 | 0 |
| 1990 | 65 | 0 |
| 1991 | 74 | 0 |
| 1992 | 60 | 0 |
| 1993 | 56 | 0 |
| 1994 | 33 | 0 |
| 1995 | 48 | 0 |
| 1996 | 50 | 0 |
| 1997 | 41 | 0 |
| 1998 | 34 | 0 |
| 1999 | 41 | 0 |
| 2000 | 32 | 0 |
| 2001 | 55 | 22 |
| 2002 | 72 | 90 |
| 2003 | 64 | 68 |
| 2004 | 58 | 88 |
| 2005 | 47 | 71 |
| 2006 | 37 | 79 |
| 2007 | 48 | 70 |
| 2008 | 52 | 55 |
| 2009 | 36 | 71 |
| 2010 | 42 | 104 |
| 2011 | 48 | 102 |
| 2012 | 67 | 116 |
| 2013 | 56 | 120 |
| 2014 | 40 | 138 |
| 2015 | 68 | 168 |
| 2016 | 97 | 148 |
| 2017 | 118 | 155 |
| 2018 | 110 | 173 |
| 2019 | 128 | 150 |
| 2020 | 144 | 171 |
| 2021 | 125 | 164 |
| 2022 | 150 | 188 |
| 2023 | 138 | 142 |
| 2024 | 114 | 159 |
| 2025 | 95 | 115 |
| 2026 | 78 | 78 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dispersed iron oxide magnetic powder slurry and method for producing same6 Oct 2026US 12,753,089 B2Dowa Electronics Materials Co., Ltd.
- Flexible high-temperature superconductor and method for its production6 Oct 2026US 12,755,869 B2S-Innovations LLC
- Anisotropic iron nitride permanent magnets6 Oct 2026US 12,755,878 B2Niron Magnetics, Inc.
- Method of manufacturing permanent magnets6 Oct 2026US 12,755,879 B2
- Iron-chromium-cobalt alloy magnet and method for producing same29 Sep 2026US 12,749,602 B2Proterial, Ltd.
- Rare earth sintered magnet, method for producing rare earth sintered magnet, rotor, and rotary machine8 Oct 2026US 2026/0311916 A1Mitsubishi Electric Corporation
- Magnetic steel containing high-abundance rare earth elements, preparation method therefor, and use thereof8 Oct 2026US 2026/0311917 A1FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.
- Manufacturing method of rare earth magnet1 Oct 2026US 2026/0295667 A1Honda Motor Co., Ltd.
- Rare earth sintered magnet, method for producing rare earth sintered magnet, rotor, and rotary machine1 Oct 2026US 2026/0302010 A1Mitsubishi Electric Corporation
- Permanent magnet1 Oct 2026US 2026/0302011 A1Korea Institute of Materials Science
Most cited
By later US patents
- Magnetically coded device145US 5,631,093 AGeneral Motors Corporation · 1997
- Method of making environmentally stable reactive alloy powders127US 5,372,629 AIowa State University Research Foundation, Inc. · 1994
- Magnetic tape and magnetic tape device121US 10,074,393 B2FUJIFILM Corporation · 2018
- Thin film solar cell including a spatially modulated intrinsic layer119US 4,816,082 AEnergy Conversion Devices, Inc. · 1989
- Magnetic polymer particles and process for the preparation thereof117US 4,654,267 ASintef · 1987