H01P 1/38
Circulators
H01P1/38 (Circulators) appears on 637 US grants and 541 published applications in this corpus.
Search patents in H01P- Granted patents
- 637
- Published applications
- 541
- Assignees
- 220
- Inventors
- 877
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 8 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 14 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 7 | 0 |
| 1998 | 12 | 0 |
| 1999 | 13 | 0 |
| 2000 | 15 | 0 |
| 2001 | 9 | 15 |
| 2002 | 17 | 38 |
| 2003 | 33 | 22 |
| 2004 | 28 | 26 |
| 2005 | 28 | 15 |
| 2006 | 13 | 21 |
| 2007 | 11 | 5 |
| 2008 | 8 | 8 |
| 2009 | 9 | 21 |
| 2010 | 20 | 18 |
| 2011 | 11 | 8 |
| 2012 | 15 | 13 |
| 2013 | 15 | 17 |
| 2014 | 13 | 16 |
| 2015 | 17 | 26 |
| 2016 | 21 | 30 |
| 2017 | 31 | 31 |
| 2018 | 28 | 38 |
| 2019 | 26 | 33 |
| 2020 | 31 | 18 |
| 2021 | 21 | 27 |
| 2022 | 16 | 15 |
| 2023 | 19 | 27 |
| 2024 | 24 | 23 |
| 2025 | 19 | 14 |
| 2026 | 14 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for performing full duplex radio in wireless communication system29 Sep 2026US 12,750,085 B2Industry-Academic Cooperation Foundation, Yonsei University
- Coupler and electronic device15 Sep 2026US 12,738,625 B2Huawei Technologies Co., Ltd.
- Stacked double junction circulator device and methods for fabrication4 Aug 2026US 12,700,653 B2TTM Technologies, Inc.
- Electrical filter topology21 Jul 2026US 12,689,406 B2Telefonaktiebolaget LM Ericsson (publ)
- Folded circulator device with coupling elements and flex connections for interconnects and methods of fabricating the circulator device14 Jul 2026US 12,683,261 B2TTM Technologies, Inc.
- Waveguide device, microwave outdoor unit, and long-haul microwave transmission device24 Sep 2026US 2026/0291044 A1
- Power amplification circuit, radio frequency generation device, and communication system17 Sep 2026US 2026/0280498 A1Huawei Technologies Co., Ltd.
- Phase shifter assembly, cavity phase shifter with phase shifter assembly and base station antenna13 Aug 2026US 2026/0237877 A1Outdoor Wireless Networks LLC
- Remote compensators for mobile devices6 Aug 2026US 2026/0229759 A1Skyworks Solutions, Inc.
- Methods of forming a temperature-stable, low-dielectric constant material with an ultra-low loss tangent16 Jul 2026US 2026/0200802 A1Skyworks Solutions, Inc.
Most cited
By later US patents
- Transmitting/receiving antenna, isolator, high-frequency oscillator, and high-frequency transmitter-receiver using the same232US 7,602,333 B2KYOCERA Corporation · 2009
- Structure comprising at least a first element bonded to a carrier having a closed metallic channel waveguide formed therein206US 10,276,909 B2Invensas Bonding Technologies, Inc. · 2019
- Compact lumped constant non-reciprocal circuit element79US 5,164,687 ARenaissance Electronics Corporation · 1992
- Nonreciprocal circuit device and composite electronic component63US 5,945,887 AMurata Manufacturing Co., Ltd. · 1999
- Isolator/circulator having propeller resonator loaded with a plurality of symmetric magnetic walls56US 6,646,515 B2EG Co., Ltd. · 2003