H01F 1/344
Ferrites
Official title: {Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4}
H01F1/344 (Ferrites) appears on 519 US grants and 635 published applications in this corpus.
Search patents in H01F- Granted patents
- 519
- Published applications
- 635
- Assignees
- 245
- Inventors
- 1,191
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 11 | 0 |
| 2000 | 9 | 0 |
| 2001 | 11 | 4 |
| 2002 | 17 | 14 |
| 2003 | 11 | 27 |
| 2004 | 18 | 17 |
| 2005 | 12 | 17 |
| 2006 | 11 | 10 |
| 2007 | 15 | 16 |
| 2008 | 9 | 11 |
| 2009 | 7 | 19 |
| 2010 | 11 | 19 |
| 2011 | 14 | 27 |
| 2012 | 10 | 21 |
| 2013 | 23 | 16 |
| 2014 | 11 | 12 |
| 2015 | 6 | 22 |
| 2016 | 19 | 25 |
| 2017 | 23 | 19 |
| 2018 | 14 | 21 |
| 2019 | 17 | 35 |
| 2020 | 17 | 35 |
| 2021 | 22 | 53 |
| 2022 | 33 | 61 |
| 2023 | 43 | 52 |
| 2024 | 37 | 36 |
| 2025 | 38 | 32 |
| 2026 | 20 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Magnetic resin composition, cured product, and electronic component6 Oct 2026US 12,755,880 B2FUJIFILM Corporation
- M-type hexaferrite comprising a low dielectric loss ceramic29 Sep 2026US 12,749,604 B2Rogers Corporation
- Multifferoic R-type hexaferrite, a composite and an article comprising the R-type hexaferrite, and a method of making the same22 Sep 2026US 12,744,140 B2Rogers Corporation
- Coil component22 Sep 2026US 12,744,141 B2Murata Manufacturing Co., Ltd.
- Radio wave absorber and radio wave absorbing composition15 Sep 2026US 12,738,665 B2FUJIFILM Corporation
- Self-assembled soft magnetic ferrite nanocomposite materials and passive components and methods of making same1 Oct 2026US 2026/0296983 A1University of Pittsburgh—Of the Commonwealth System of Higher Education
- Soft magnetic powder, magnetic body, and coil device1 Oct 2026US 2026/0302019 A1TDK Corporation
- Ferrite sintered body and electronic device using thereof1 Oct 2026US 2026/0302020 A1TDK Corporation
- Soft magnetic powder, magnetic and coil device24 Sep 2026US 2026/0290666 A1TDK Corporation
- Ferrite composition and magnetic core comprising same17 Sep 2026US 2026/0279633 A1LG Innotek Co., Ltd.
Most cited
By later US patents
- Non-spherical nanopowder derived nanocomposites126US 6,916,872 B2NanoProducts Corporation · 2005
- Noise suppressor116US 5,500,629 A1996
- Nanotechnology for drug delivery, contrast agents and biomedical implants110US 6,933,331 B2NanoProducts Corporation · 2005
- Manganese-zinc system ferrite96US 5,980,773 ATDK Corporation · 1999
- Multi-layer transformer having electrical connection in a magnetic core67US 6,054,914 AMidcom, Inc. · 2000