H01F 1/04
Metals or alloys
Official title: metals or alloys
H01F1/04 (Metals or alloys) appears on 2,591 US grants and 2,581 published applications in this corpus.
Search patents in H01F- Granted patents
- 2,591
- Published applications
- 2,581
- Assignees
- 809
- Inventors
- 4,561
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 23 | 0 |
| 1978 | 24 | 0 |
| 1979 | 19 | 0 |
| 1980 | 19 | 0 |
| 1981 | 28 | 0 |
| 1982 | 31 | 0 |
| 1983 | 27 | 0 |
| 1984 | 22 | 0 |
| 1985 | 16 | 0 |
| 1986 | 24 | 0 |
| 1987 | 17 | 0 |
| 1988 | 27 | 0 |
| 1989 | 56 | 0 |
| 1990 | 62 | 0 |
| 1991 | 66 | 0 |
| 1992 | 54 | 0 |
| 1993 | 49 | 0 |
| 1994 | 30 | 0 |
| 1995 | 44 | 0 |
| 1996 | 43 | 0 |
| 1997 | 31 | 0 |
| 1998 | 30 | 0 |
| 1999 | 33 | 0 |
| 2000 | 23 | 0 |
| 2001 | 46 | 17 |
| 2002 | 63 | 82 |
| 2003 | 57 | 53 |
| 2004 | 47 | 77 |
| 2005 | 39 | 67 |
| 2006 | 33 | 64 |
| 2007 | 46 | 62 |
| 2008 | 43 | 44 |
| 2009 | 35 | 53 |
| 2010 | 36 | 84 |
| 2011 | 42 | 94 |
| 2012 | 59 | 97 |
| 2013 | 47 | 106 |
| 2014 | 29 | 118 |
| 2015 | 58 | 142 |
| 2016 | 74 | 133 |
| 2017 | 99 | 133 |
| 2018 | 98 | 150 |
| 2019 | 111 | 119 |
| 2020 | 123 | 142 |
| 2021 | 102 | 141 |
| 2022 | 117 | 159 |
| 2023 | 107 | 117 |
| 2024 | 98 | 150 |
| 2025 | 80 | 101 |
| 2026 | 70 | 76 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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.
- R-T-B based permanent magnet and method for manufacturing same29 Sep 2026US 12,749,603 B2TDK Corporation
- Compound for bonded magnet, bonded magnet, method of producing same, and resin composition for bonded magnets29 Sep 2026US 12,749,619 B2Nichia Corporation
- 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
- Thin film solar cell including a spatially modulated intrinsic layer119US 4,816,082 AEnergy Conversion Devices, Inc. · 1989
- Magnetic materials and permanent magnets113US 4,770,723 ASumitomo Special Metals Co., Ltd. · 1988
- Magnetic particle and method of preparing the same, and magnetic recording medium108US 8,524,108 B2FUJIFILM Corporation · 2013