H03H 11/1295
Parallel-t filters
Official title: {Parallel-T filters}
H03H11/1295 (Parallel-t filters) appears on 12 US grants and 7 published applications in this corpus.
Search patents in H03H- Granted patents
- 12
- Published applications
- 7
- Assignees
- 12
- Inventors
- 18
- Latest grant
- 6 Oct 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Distortion measurement and correction system and method6 Oct 2015US 9,152,747 B2Xcerra Corporation
- Chopper stabilized amplifier25 May 2010US 7,724,080 B2Intersil Americas Inc.
- Twin-T dual notch filter24 Oct 2006US 7,127,226 B2Matsushita Electric Industrial Co., Ltd.
- Band pass filter from two filters10 Dec 2002US 6,492,865 B1Acoustic Technologies, Inc.
- Separation of plural band pass filters11 Jun 2002US 6,404,278 B2Acoustic Technologies, Inc.
- Notch filter circuit with all-pass filter for independent control of filter gain and quality factor6 Aug 2026US 2026/0230062 A1QUALCOMM Incorporated
- Reconfigurable multi-feedback filter for mmw receivers18 Dec 2025US 2025/0385697 A1QUALCOMM Incorporated
- Distortion measurement and correction system and method12 Feb 2015US 2015/0042402 A1LTX-Credence Corporation
- Chopper stabilized amplifier17 Dec 2009US 2009/0309653 A1Intersil Americas Inc.
- Twin-T dual notch filter3 Jul 2003US 2003/0125004 A1Tropian, Inc.
Most cited
By later US patents
- Integrated filter circuit having switchable selected parallel filter paths16US 4,724,407 AHitachi, Ltd. · 1988
- Bandpass amplifier and receiver using bandpass amplifier15US 4,984,292 ACorrepro (Canada) Inc. · 1991
- Chopper stabilized amplifier15US 7,724,080 B2Intersil Americas Inc. · 2010
- RC-Active filters8US 4,553,103 ABritish Telecommunications plc · 1985
- Second order active filters6US 4,994,693 ANorthern Telecom Limited · 1991