H01F 1/442
The magnetic component being a metal or alloy
Official title: {the magnetic component being a metal or alloy, e.g. Fe (H01F1/447 takes precedence)}
H01F1/442 (The magnetic component being a metal or alloy) appears on 83 US grants and 55 published applications in this corpus.
Search patents in H01F- Granted patents
- 83
- Published applications
- 55
- Assignees
- 69
- Inventors
- 202
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 1 |
| 2003 | 1 | 3 |
| 2004 | 4 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 2 |
| 2007 | 2 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 3 |
| 2010 | 0 | 4 |
| 2011 | 1 | 1 |
| 2012 | 1 | 3 |
| 2013 | 6 | 2 |
| 2014 | 4 | 0 |
| 2015 | 1 | 1 |
| 2016 | 2 | 2 |
| 2017 | 1 | 3 |
| 2018 | 2 | 1 |
| 2019 | 1 | 4 |
| 2020 | 3 | 2 |
| 2021 | 4 | 3 |
| 2022 | 2 | 5 |
| 2023 | 6 | 3 |
| 2024 | 1 | 1 |
| 2025 | 0 | 3 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Anisotropic iron nitride permanent magnets6 Oct 2026US 12,755,878 B2Niron Magnetics, Inc.
- Magnetic liquid metal processing method, liquid gripper and manipulation method23 Jun 2026US 12,662,334 B2Suzhou University
- Magnetorheological fluid and device28 May 2024US 11,996,223 B2Nippon Paint Holdings Co., Ltd.
- Stretchable sensor and method of manufacturing the same and wearable device26 Dec 2023US 11,856,691 B2Samsung Electronics Co., Ltd.
- Anisotropic iron nitride permanent magnets28 Nov 2023US 11,830,644 B2Niron Magnetics, Inc.
- Magnetic Fluid Composition1 Oct 2026US 2026/0302022 A1Seiko Epson Corporation
- Magnetic Fluid Composition1 Oct 2026US 2026/0302023 A1Seiko Epson Corporation
- Magnetorheological Fluid And Braking Device2 Apr 2026US 2026/0094746 A1Seiko Epson Corporation
- Low-temperature-resistant magnetorheological fluid and preparation method thereof19 Mar 2026US 2026/0081057 A1Chongqing Cicheng Technology Co., Ltd.
- Magnetic Fluid Composition2 Oct 2025US 2025/0308736 A1Seiko Epson Corporation
Most cited
By later US patents
- Magnetorheological materials based on alloy particles186US 5,382,373 ALord Corporation · 1995
- Method for producing nanoparticles of transition metals185US 6,262,129 B1International Business Machines Corporation · 2001
- Magnetorheological polishing devices and methods59US 5,449,313 AByelocorp Scientific, Inc. · 1995
- Electrically conductive ferrofluid compositions and method of preparing and using same51US 4,604,229 AFerrofluidics Corporation · 1986
- Electrically conductive ferrofluid bearing and seal apparatus and low-viscosity electrically conductive ferrofluid used therein42US 4,673,997 AFerrofluidics Corporation · 1987