H03H 11/04
Frequency selective two-port networks
H03H11/04 (Frequency selective two-port networks) appears on 2,104 US grants and 1,462 published applications in this corpus.
Search patents in H03H- Granted patents
- 2,104
- Published applications
- 1,462
- Assignees
- 763
- Inventors
- 3,152
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 26 | 0 |
| 1978 | 10 | 0 |
| 1979 | 7 | 0 |
| 1980 | 11 | 0 |
| 1981 | 23 | 0 |
| 1982 | 16 | 0 |
| 1983 | 18 | 0 |
| 1984 | 16 | 0 |
| 1985 | 17 | 0 |
| 1986 | 14 | 0 |
| 1987 | 16 | 0 |
| 1988 | 19 | 0 |
| 1989 | 38 | 0 |
| 1990 | 17 | 0 |
| 1991 | 21 | 0 |
| 1992 | 27 | 0 |
| 1993 | 32 | 0 |
| 1994 | 26 | 0 |
| 1995 | 36 | 0 |
| 1996 | 27 | 0 |
| 1997 | 35 | 0 |
| 1998 | 36 | 0 |
| 1999 | 43 | 0 |
| 2000 | 35 | 0 |
| 2001 | 41 | 26 |
| 2002 | 59 | 33 |
| 2003 | 57 | 55 |
| 2004 | 53 | 64 |
| 2005 | 48 | 71 |
| 2006 | 77 | 62 |
| 2007 | 52 | 62 |
| 2008 | 56 | 65 |
| 2009 | 55 | 53 |
| 2010 | 57 | 64 |
| 2011 | 55 | 49 |
| 2012 | 32 | 42 |
| 2013 | 71 | 54 |
| 2014 | 63 | 55 |
| 2015 | 65 | 56 |
| 2016 | 63 | 58 |
| 2017 | 63 | 55 |
| 2018 | 57 | 47 |
| 2019 | 70 | 105 |
| 2020 | 128 | 87 |
| 2021 | 64 | 53 |
| 2022 | 50 | 60 |
| 2023 | 40 | 50 |
| 2024 | 50 | 57 |
| 2025 | 59 | 47 |
| 2026 | 32 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03H 11/12Using amplifiers with feedback1,128
- H03H 11/0422Using transconductance amplifiers330
- H03H 2011/0494Complex filtersIndexing code135
- H03H 11/0405Non-linear filters59
- H03H 2011/0488Notch or bandstop filtersIndexing code59
- H03H 11/08Using gyrators34
- H03H 11/10Using negative impedance converters21
- H03H 11/06Comprising means for compensation of loss15
All 13 subgroupsShow fewer
Recent patents
- Radio frequency switch29 Sep 2026US 12,749,797 B2Intel Corporation
- Radio-frequency circuit and communication device22 Sep 2026US 12,744,553 B2Murata Manufacturing Co., Ltd.
- Method for identifying brush type, cleaning device and storage medium15 Sep 2026US 12,733,783 B2Beijing Xiaomi Mobile Software Co., Ltd.
- Structure and fabrication of PCM-based capacitor bank15 Sep 2026US 12,740,343 B2Taiwan Semiconductor Manufacturing Comany, Ltd.
- Method of precharging a switchable filter8 Sep 2026US 12,732,162 B2Qm Technologies Aps
- Passive switched-capacitor filter with tunable complex poles8 Oct 2026US 2026/0312567 A1Apple Inc.
- Tunable superconducting filters24 Sep 2026US 2026/0291466 A11372934 B. C. Ltd.
- Isolated type active emi filter having no additional elements on power line24 Sep 2026US 2026/0291467 A1Em Coretech Inc.
- Tunable transconductance-capacitance filter24 Sep 2026US 2026/0291468 A1QUALCOMM Incorporated
- Structure and fabrication of pcm-based capacitor bank24 Sep 2026US 2026/0293540 A1Taiwan Semiconductor Manufacturing Company.Ltd
Most cited
By later US patents
- Tunable filter and method of tuning a filter328US 6,778,023 B2Nokia Corporation · 2004
- Adaptive radio transceiver with low noise amplification211US 6,417,737 B1Broadcom Corporation · 2002
- Tunable filter with bypass134US 6,618,579 B1The Chase Manhattan Bank · 2003
- Vector sum phase shifter, optical transceiver, and control circuit128US 8,687,968 B2Nippon Telegraph and Telephone Corporation · 2014
- Method and apparatus for tuning a continuous time filter127US 5,914,633 ALucent Technologies Inc. · 1999