H01P 1/212
Suppressing or attenuating harmonic frequencies
Official title: suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence)
H01P1/212 (Suppressing or attenuating harmonic frequencies) appears on 68 US grants and 67 published applications in this corpus.
Search patents in H01P- Granted patents
- 68
- Published applications
- 67
- Assignees
- 59
- Inventors
- 145
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 5 |
| 2003 | 4 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 4 |
| 2015 | 2 | 4 |
| 2016 | 3 | 2 |
| 2017 | 3 | 2 |
| 2018 | 2 | 5 |
| 2019 | 3 | 4 |
| 2020 | 5 | 5 |
| 2021 | 1 | 4 |
| 2022 | 7 | 6 |
| 2023 | 2 | 8 |
| 2024 | 6 | 1 |
| 2025 | 5 | 1 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cavity filter20 Jan 2026US 12,531,320 B2Suzhou Luxshare Technology Co., Ltd.
- EBG-based electronic filter using multi-layer and multi-cell structure13 Jan 2026US 12,525,693 B1Amazon Technologies, Inc.
- Millimeter-wave antenna-in-package and terminal device25 Nov 2025US 12,482,946 B2Huawei Technologies Co., Ltd.
- Printed microstrip filter30 Sep 2025US 12,431,601 B2Knowles Cazenovia, Inc.
- RF source protection9 Sep 2025US 12,414,221 B2Elekta Limited
- Radio frequency filters on feed boards10 Sep 2026US 2026/0269444 A1CommScope Italy S.r.l.
- Cavity filter30 Apr 2026US 2026/0121271 A1Suzhou Luxshare Technology Co., Ltd.
- Quantum chip parameter determination method and device, filtering regulation method and device12 Feb 2026US 2026/0045672 A1Yangtze Delta Industrial Innovation Center of Quantum Science and Technology
- Higher-order mode suppressor, waveguide filter device using same, spectrum analyzer, signal analyzer, signal generation device, higher-order mode suppression control method, and filter configuration method12 Jun 2025US 2025/0192407 A1Anritsu Corporation
- Cavity filter18 Jan 2024US 2024/0021968 A1Suzhou Luxshare Technology Co., Ltd.
Most cited
By later US patents
- Harmonic matching network for a saturated amplifier97US 6,577,199 B2Ericsson Inc. · 2003
- Integrated filter construction44US 6,023,608 ALK-Products Oy · 2000
- Dielectric filter42US 5,319,328 ALK-Products Oy · 1994
- Harmonic rejection load tuner33US 6,297,649 B1Focus Microwaves Inc. · 2001
- Strip-line resonator and a band pass filter having the same23US 4,371,853 AMatsushita Electric Industrial Co., Ltd. · 1983