H03H 17/0294
Variable filters
Official title: {Variable filters; Programmable filters}
H03H17/0294 (Variable filters) appears on 429 US grants and 331 published applications in this corpus.
Search patents in H03H- Granted patents
- 429
- Published applications
- 331
- Assignees
- 271
- Inventors
- 862
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 11 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 11 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 8 | 3 |
| 2002 | 16 | 14 |
| 2003 | 13 | 14 |
| 2004 | 5 | 22 |
| 2005 | 11 | 22 |
| 2006 | 18 | 14 |
| 2007 | 19 | 16 |
| 2008 | 14 | 25 |
| 2009 | 13 | 10 |
| 2010 | 8 | 17 |
| 2011 | 12 | 13 |
| 2012 | 22 | 15 |
| 2013 | 25 | 13 |
| 2014 | 17 | 13 |
| 2015 | 13 | 9 |
| 2016 | 15 | 3 |
| 2017 | 26 | 21 |
| 2018 | 10 | 8 |
| 2019 | 13 | 11 |
| 2020 | 11 | 9 |
| 2021 | 3 | 11 |
| 2022 | 11 | 12 |
| 2023 | 13 | 7 |
| 2024 | 10 | 13 |
| 2025 | 6 | 12 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Horner form arbitrary coefficient multiplierless fir filter13 Jan 2026US 12,525,962 B2The Boeing Company
- Efficient architecture for high-performance DSP-based long-reach SERDES26 Aug 2025US 12,401,346 B2Avago Technologies International Sales Pte. Limited
- Dynamic current-mode finite impulse response filter19 Aug 2025US 12,395,155 B2Northrop Grumman Systems Corporation
- Methods and apparatus of charge-sharing locking with digital controlled oscillators22 Jul 2025US 12,368,445 B2Taiwan Semiconductor Manufacturing Company.Ltd
- Active temperature compensation technique for structural health monitoring sensors15 Jul 2025US 12,360,086 B2The Boeing Company
- Switch-capacitor filter for receiver baseband anti-aliasing signal filtering21 May 2026US 2026/0142670 A1QUALCOMM Incorporated
- Method for determining a digital finite impulse response filter and associated computer program and determining system5 Mar 2026US 2026/0066881 A1Thales
- Systems and methods for in-band rejection filter for self sufficiency in broadband wireless communication26 Feb 2026US 2026/0059510 A1Ondas Networks Inc.
- System and method for operating fir filters in multi-channel audio systems5 Feb 2026US 2026/0040018 A1Harman Becker Automotive Systems GmbH
- Methods and apparatus of charge-sharing locking with digital controlled oscillators25 Dec 2025US 2025/0392316 A1Taiwan Semiconductor Manufacturing Company.Ltd
Most cited
By later US patents
- ECG muscle artifact filter system246US 5,259,387 AQuinton Instrument Company · 1993
- Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signal in hearing aids227US 6,236,731 B1dspfactory Ltd. · 2001
- Tunable bandpass filter system and filtering method139US 5,136,267 AAudio Precision, Inc. · 1992
- Filter circuit with switchable finite impulse response and infinite impulse response filter characteristics122US 5,388,063 AYozan Inc. · 1995
- Variable decimation architecture for a delta-sigma analog-to-digital converter104US 5,157,395 ACrystal Semiconductor Corporation · 1992