H01P 1/387
Strip line circulators
H01P1/387 (Strip line circulators) appears on 364 US grants and 308 published applications in this corpus.
Search patents in H01P- Granted patents
- 364
- Published applications
- 308
- Assignees
- 114
- Inventors
- 487
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 5 | 13 |
| 2002 | 10 | 33 |
| 2003 | 31 | 19 |
| 2004 | 24 | 23 |
| 2005 | 26 | 8 |
| 2006 | 7 | 16 |
| 2007 | 6 | 3 |
| 2008 | 7 | 8 |
| 2009 | 6 | 12 |
| 2010 | 12 | 15 |
| 2011 | 8 | 8 |
| 2012 | 12 | 7 |
| 2013 | 11 | 10 |
| 2014 | 6 | 6 |
| 2015 | 6 | 12 |
| 2016 | 8 | 8 |
| 2017 | 14 | 15 |
| 2018 | 9 | 13 |
| 2019 | 10 | 20 |
| 2020 | 19 | 7 |
| 2021 | 12 | 15 |
| 2022 | 6 | 5 |
| 2023 | 8 | 13 |
| 2024 | 8 | 12 |
| 2025 | 8 | 5 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stacked double junction circulator device and methods for fabrication4 Aug 2026US 12,700,653 B2TTM Technologies, Inc.
- Non-reciprocal circuit21 Apr 2026US 12,609,430 B2Mitsubishi Electric Corporation
- Radio frequency transmission front-end module and associated manufacturing method13 Jan 2026US 12,526,000 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Magnetless cryogenic circulator21 Oct 2025US 12,451,575 B2
- Circulator design and methods of fabricating the circulator16 Sep 2025US 12,418,085 B2TTM Technologies, Inc.
- Radio frequency front-end module with embedded circulators18 Jun 2026US 2026/0173253 A1
- Thermalized pocketed cryogenic circulator with ground tuning19 Mar 2026US 2026/0081334 A1Google Inc.
- Non-reciprocal circuit element20 Nov 2025US 2025/0357653 A1TDK Corporation
- Design of stacked double junction circulator device and methods for fabrication9 Oct 2025US 2025/0316876 A1TTM Technologies, Inc.
- Irreversible circuit element and method of manufacturing irreversible circuit element6 Mar 2025US 2025/0079676 A1TDK Corporation
Most cited
By later US patents
- Compact lumped constant non-reciprocal circuit element79US 5,164,687 ARenaissance Electronics Corporation · 1992
- Isolator/circulator having propeller resonator loaded with a plurality of symmetric magnetic walls56US 6,646,515 B2EG Co., Ltd. · 2003
- Embedded planar circulator40US 6,611,180 B1Raytheon Company · 2003
- Isolator device with built-in power amplifier and embedded substrate capacitor39US 6,462,628 B2TDK Corporation · 2002
- Composite resonator34US 4,122,418 A1978