H03H 17/02
Frequency selective networks
Official title: Frequency selective networks {(digital computers for complex mathematical operations G06F17/10)}
H03H17/02 (Frequency selective networks) appears on 3,187 US grants and 1,984 published applications in this corpus.
Search patents in H03H- Granted patents
- 3,187
- Published applications
- 1,984
- Assignees
- 1,125
- Inventors
- 4,849
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 21 | 0 |
| 1978 | 15 | 0 |
| 1979 | 8 | 0 |
| 1980 | 19 | 0 |
| 1981 | 11 | 0 |
| 1982 | 23 | 0 |
| 1983 | 9 | 0 |
| 1984 | 14 | 0 |
| 1985 | 18 | 0 |
| 1986 | 26 | 0 |
| 1987 | 27 | 0 |
| 1988 | 46 | 0 |
| 1989 | 66 | 0 |
| 1990 | 40 | 0 |
| 1991 | 45 | 0 |
| 1992 | 56 | 0 |
| 1993 | 72 | 0 |
| 1994 | 63 | 0 |
| 1995 | 76 | 0 |
| 1996 | 88 | 0 |
| 1997 | 62 | 0 |
| 1998 | 84 | 0 |
| 1999 | 114 | 0 |
| 2000 | 60 | 0 |
| 2001 | 90 | 24 |
| 2002 | 84 | 112 |
| 2003 | 86 | 87 |
| 2004 | 74 | 97 |
| 2005 | 71 | 112 |
| 2006 | 113 | 88 |
| 2007 | 88 | 91 |
| 2008 | 86 | 91 |
| 2009 | 78 | 57 |
| 2010 | 68 | 74 |
| 2011 | 64 | 60 |
| 2012 | 65 | 59 |
| 2013 | 103 | 57 |
| 2014 | 84 | 72 |
| 2015 | 80 | 62 |
| 2016 | 72 | 73 |
| 2017 | 93 | 84 |
| 2018 | 91 | 86 |
| 2019 | 102 | 103 |
| 2020 | 103 | 80 |
| 2021 | 71 | 96 |
| 2022 | 98 | 86 |
| 2023 | 78 | 62 |
| 2024 | 70 | 83 |
| 2025 | 49 | 49 |
| 2026 | 39 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03H 17/06Non-recursive filters1,433
- H03H 17/0248Filters characterised by a particular frequency response or filtering method956
- H03H 17/0223Computation saving measures437
- H03H 17/0294Variable filters429
- H03H 17/04Recursive filters398
- H03H 17/0283Filters characterised by the filter structure257
- H03H 17/0211Using specific transformation algorithms168
- H03H 17/0219Compensation of undesirable effects103
Recent patents
- Adaptive filter device and method for providing an output signal6 Oct 2026US 12,756,379 B2u-blox AG
- Device and method for continuous-time energy calculation of an analog signal6 Oct 2026US 12,756,401 B2Junia
- Signal processing apparatus for generating a plurality of output samples using combiner logic based on a hiearchical tree structure29 Sep 2026US 12,750,040 B2Advantest Corporation
- Load sharing techniques for electric power sources22 Sep 2026US 12,744,404 B2Caterpillar Inc.
- Method and apparatus for permuting streamed data elements8 Sep 2026US 12,730,758 B2Texas Instruments Incorporated
- Techniques for diminishing latency in a distributed antenna system8 Oct 2026US 2026/0312607 A1Outdoor Wireless Networks LLC
- Real-time parameter based obstacle detection1 Oct 2026US 2026/0297988 A1GM Global Technology Operations LLC
- Peak-to-peak ratio based obstacle detection1 Oct 2026US 2026/0302988 A1GM Global Technology Operations LLC
- Energy control method and controller for energy management24 Sep 2026US 2026/0291276 A1Wistron Corporation
- Compensation filter circuit17 Sep 2026US 2026/0280532 A1STMicroelectronics International N. V.
Most cited
By later US patents
- Signature filter system544US 4,944,036 A1990
- Distributed decimation sample rate conversion382US 5,880,980 ARockwell International Corporation · 1999
- 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
- Method and apparatus for removing baseline wander from an egg signal180US 6,280,391 B1Physio-Control Manufacturing Corporation · 2001