H01F 1/11
In the form of particles
Official title: in the form of particles {(for magnetic record carriers G11B5/70626)}
H01F1/11 (In the form of particles) appears on 492 US grants and 472 published applications in this corpus.
Search patents in H01F- Granted patents
- 492
- Published applications
- 472
- Assignees
- 278
- Inventors
- 1,037
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 9 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 6 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 11 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 6 |
| 2002 | 14 | 9 |
| 2003 | 7 | 17 |
| 2004 | 12 | 15 |
| 2005 | 11 | 7 |
| 2006 | 4 | 18 |
| 2007 | 4 | 9 |
| 2008 | 12 | 13 |
| 2009 | 3 | 21 |
| 2010 | 8 | 26 |
| 2011 | 8 | 11 |
| 2012 | 10 | 23 |
| 2013 | 12 | 20 |
| 2014 | 13 | 22 |
| 2015 | 14 | 33 |
| 2016 | 20 | 13 |
| 2017 | 26 | 20 |
| 2018 | 8 | 23 |
| 2019 | 17 | 32 |
| 2020 | 18 | 28 |
| 2021 | 21 | 21 |
| 2022 | 28 | 36 |
| 2023 | 30 | 24 |
| 2024 | 16 | 14 |
| 2025 | 17 | 8 |
| 2026 | 10 | 3 |
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.
- Composite member8 Sep 2026US 12,731,710 B2Panasonic Intellectual Property Management Co., Ltd.
- Magnetic powder for magnetic recording medium, and production method thereof25 Aug 2026US 12,718,974 B2Dowa Electronics Materials Co., Ltd.
- Nitrile rubber-based composition21 Jul 2026US 12,686,762 B2Nok Corporation
- Magnetic composition comprising a resin consisting of copolymers containing polyamide blocks and polyether blocks2 Jun 2026US 12,643,991 B2Arkema France
- A magnetic device comprising magnetic particles10 Sep 2026US 2026/0269112 A1Bionaut Labs Ltd.
- Article comprising radio wave absorber and radio wave absorber27 Aug 2026US 2026/0254127 A1FUJIFILM Corporation
- Bonded magnet, on-vehicle main motor and oil pump comprising bonded magnet, curable composition for bonded magnet, and method for producing bonded magnet11 Jun 2026US 2026/0162859 A1Nichia Corporation
- Electric-wave absorber and electric-wave absorbing device23 Oct 2025US 2025/0331141 A1Maxell, Ltd.
- Method for producing cobalt ferrite particles and cobalt ferrite particles produced by same11 Sep 2025US 2025/0282637 A1Nittetsu Mining Co., Ltd.
Most cited
By later US patents
- Magnetic tape and magnetic tape device121US 10,074,393 B2FUJIFILM Corporation · 2018
- Magnetic polymer particles and process for the preparation thereof117US 4,654,267 ASintef · 1987
- Hexagonal ferrite magnetic powder for magnetic recording, method for producing hexagonal ferrite magnetic particles, and magnetic recording medium112US 9,748,026 B2FUJIFILM Corporation · 2017
- Magnetic tape109US 9,704,525 B2FUJIFILM Corporation · 2017
- Process for producing magnetically responsive polymer particles and application thereof90US 5,091,206 ABaxter Diagnostics Inc. · 1992