H03H 21/002
Filters with a particular frequency response
Official title: {Filters with a particular frequency response (H03H21/0014 - H03H21/0018 take precedence)}
H03H21/002 (Filters with a particular frequency response) appears on 42 US grants and 33 published applications in this corpus.
Search patents in H03H- Granted patents
- 42
- Published applications
- 33
- Assignees
- 35
- Inventors
- 70
- 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 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 2 | 1 |
| 2012 | 1 | 5 |
| 2013 | 4 | 2 |
| 2014 | 2 | 3 |
| 2015 | 4 | 2 |
| 2016 | 4 | 3 |
| 2017 | 0 | 5 |
| 2018 | 2 | 1 |
| 2019 | 5 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adaptive filter device and method for providing an output signal6 Oct 2026US 12,756,379 B2u-blox AG
- Micromirror resonance supression using configurable filter14 Jul 2026US 12,683,585 B2Microsoft Technology Licensing, LLC
- Gate driver for a low dropout voltage regulator24 Feb 2026US 12,562,631 B2NXP B. V.
- Frequency response method and apparatus26 Oct 2021US 11,158,341 B2Soundtheory Limited
- Motor control apparatus4 Aug 2020US 10,734,933 B2Mitsubishi Electric Corporation
- Hybrid time-frequency representation (htfr) based power characterization15 Jan 2026US 2026/0016512 A1
- Adaptive filter device and method for providing an output signal27 Jun 2024US 2024/0213960 A1u-blox AG
- Gate driver for a low dropout voltage regulator4 Apr 2024US 2024/0113612 A1NXP B. V.
- Micromirror resonance supression using configurable filter30 Nov 2023US 2023/0384582 A1Microsoft Technology Licensing, LLC
- Frequency response method and apparatus10 Jun 2021US 2021/0174833 A1Soundtheory Limited
Most cited
By later US patents
- Receiver and adaptive digital notch filter199US 5,226,057 ARockwell International Corporation · 1993
- Programmable RF notch filter for envelope tracking97US 9,020,451 B2RF Micro Devices, Inc. · 2015
- Bandwidth optimization for power amplifier power supplies40US 10,382,071 B2Qorvo US, Inc. · 2019
- Image filtering apparatus and method29US 4,783,839 ANational Research Development Corporation · 1988
- Self-adjusting digital notch filter28US 3,967,102 AThe United States of America as represented by the Secretary of the Air Force · 1976