H01F 1/447
Characterised by magnetoviscosity
Official title: {characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids (electrorheological fluids C10M171/001)}
H01F1/447 (Characterised by magnetoviscosity) appears on 222 US grants and 216 published applications in this corpus.
Search patents in H01F- Granted patents
- 222
- Published applications
- 216
- Assignees
- 159
- Inventors
- 503
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 2 |
| 2002 | 5 | 4 |
| 2003 | 12 | 15 |
| 2004 | 8 | 14 |
| 2005 | 6 | 9 |
| 2006 | 4 | 3 |
| 2007 | 3 | 7 |
| 2008 | 6 | 5 |
| 2009 | 3 | 5 |
| 2010 | 4 | 14 |
| 2011 | 5 | 8 |
| 2012 | 12 | 5 |
| 2013 | 7 | 11 |
| 2014 | 7 | 6 |
| 2015 | 6 | 8 |
| 2016 | 4 | 8 |
| 2017 | 6 | 10 |
| 2018 | 8 | 5 |
| 2019 | 7 | 8 |
| 2020 | 9 | 13 |
| 2021 | 10 | 11 |
| 2022 | 13 | 9 |
| 2023 | 9 | 10 |
| 2024 | 12 | 10 |
| 2025 | 4 | 9 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Magnetorheological fluid2 Jun 2026US 12,646,643 B2Honda Motor Co., Ltd.
- Combining electropermanent magnets and magnetorheological fluid to modify an operation of an input device21 Apr 2026US 12,608,088 B2Logitech Europe S. A.
- Magnetic viscous fluid and mechanical device17 Feb 2026US 12,553,007 B2Somar Corporation
- Magnetic viscous fluid and mechanical device27 Jan 2026US 12,534,683 B2Somar Corporation
- Magnetic sheet, magnetic writing system, drawing method, and erasing method20 Jan 2026US 12,530,092 B2Zero Lab Co., Ltd.
- Magnetic rheometry method20 Aug 2026US 2026/0243646 A1Aalto University Foundation sr
- A tank shunt and a transformer provided with such a tank shunt23 Apr 2026US 2026/0112538 A1Hitachi Energy Ltd
- Magnetorheological Fluid And Braking Device2 Apr 2026US 2026/0094745 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.
Most cited
By later US patents
- Intravascular pressure and flow sensor523US 5,873,835 ASciMed Life Systems, Inc. · 1999
- Magnetorheological fluid devices267US 5,284,330 ALord Corporation · 1994
- Magnetorheological fluid dampers244US 5,277,281 ALord Corporation · 1994
- Magnetorheological materials based on alloy particles186US 5,382,373 ALord Corporation · 1995
- Fluid responsive to a magnetic field130US 4,992,190 ATRW Inc. · 1991