H01P 1/23
Using ferromagnetic material
Official title: using ferromagnetic material
H01P1/23 (Using ferromagnetic material) appears on 42 US grants and 25 published applications in this corpus.
Search patents in H01P- Granted patents
- 42
- Published applications
- 25
- Assignees
- 25
- Inventors
- 64
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 4 | 2 |
| 2021 | 3 | 1 |
| 2022 | 1 | 3 |
| 2023 | 4 | 7 |
| 2024 | 2 | 2 |
| 2025 | 6 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
- Electromagnetic wave attenuator and electronic device18 Nov 2025US 12,476,341 B2Kabushiki Kaisha Toshiba
- Broadband magnetostatic surface wave devices with customizable frequency response9 Sep 2025US 12,412,970 B2Metamagnetics, Inc.
- Frequency selective limiter having an enhanced bandwidth4 Mar 2025US 12,244,048 B2Metamagnetics, Inc.
- System with magnetic film for reducing passive intermodulation18 Feb 2025US 12,230,854 B23M Innovative Properties Company
- Frequency selective limiter having reduced spike leakage18 Feb 2025US 12,231,128 B2Metamagnetics, Inc.
- Broadband magnetostatic surface wave devices with customizable frequency response2 Oct 2025US 2025/0309514 A1Metamagnetics, Inc.
- Frequency Selective Limiter Having an Enhanced Bandwidth5 Jun 2025US 2025/0183507 A1Metamagnetics, Inc.
- Frequency selective limiter having reduced spike leakage8 May 2025US 2025/0150067 A1Metamagnetics, Inc.
- System with Magnetic Film for Reducing Passive Intermodulation29 Feb 2024US 2024/0072404 A13M Innovative Properties Company
- Frequency selective limiter having reduced spike leakage29 Feb 2024US 2024/0072780 A1Metamagnetics, Inc.
Most cited
By later US patents
- Magnetostatic wave signal-to-noise-enhancer26US 4,283,692 AWestinghouse Electric Corp. · 1981
- Frequency selective limiting device16US 4,845,439 AWestinghouse Electric Corp. · 1989
- Signal-to-noise enhancer13US 5,523,725 AMurata Manufacturing Co., Ltd. · 1996
- Fixed frequency filters using epitaxial ferrite films10US 4,188,594 ARockwell International Corporation · 1980
- Dielectric waveguide ferrite modulator/switch10US 4,490,700 AThe United States of America as represented by the Secretary of the Army · 1984