H01P 1/208
Cascaded cavities
Official title: Cascaded cavities; Cascaded resonators inside a hollow waveguide structure (H01P1/205 takes precedence)
H01P1/208 (Cascaded cavities) appears on 877 US grants and 745 published applications in this corpus.
Search patents in H01P- Granted patents
- 877
- Published applications
- 745
- Assignees
- 340
- Inventors
- 1,332
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 8 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 9 | 0 |
| 1985 | 3 | 0 |
| 1986 | 10 | 0 |
| 1987 | 10 | 0 |
| 1988 | 12 | 0 |
| 1989 | 7 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 9 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 11 | 0 |
| 1998 | 26 | 0 |
| 1999 | 20 | 0 |
| 2000 | 22 | 0 |
| 2001 | 19 | 11 |
| 2002 | 24 | 23 |
| 2003 | 28 | 24 |
| 2004 | 14 | 28 |
| 2005 | 22 | 19 |
| 2006 | 12 | 13 |
| 2007 | 13 | 15 |
| 2008 | 12 | 7 |
| 2009 | 5 | 20 |
| 2010 | 17 | 13 |
| 2011 | 11 | 14 |
| 2012 | 11 | 29 |
| 2013 | 11 | 39 |
| 2014 | 25 | 29 |
| 2015 | 37 | 41 |
| 2016 | 32 | 47 |
| 2017 | 37 | 29 |
| 2018 | 46 | 52 |
| 2019 | 44 | 38 |
| 2020 | 35 | 54 |
| 2021 | 55 | 48 |
| 2022 | 40 | 45 |
| 2023 | 31 | 36 |
| 2024 | 41 | 30 |
| 2025 | 30 | 27 |
| 2026 | 29 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter device22 Sep 2026US 12,744,294 B2Murata Manufacturing Co., Ltd.
- Waveguide filter with electronically controllable variable dielectric material8 Sep 2026US 12,731,878 B2ViaSat, Inc.
- TM dual-mode dielectric resonator and TM dual-mode filter8 Sep 2026US 12,731,880 B2Telefonaktiebolaget LM Ericsson (publ)
- Wideband TEM to TM01 mode converter for microwave plasma systems25 Aug 2026US 12,719,142 B2APPLIED Materials.Inc.
- Dual-mode dielectric waveguide filter and dielectric waveguide filtering apparatus11 Aug 2026US 12,706,360 B2Samsung Electronics Co., Ltd.
- Radio frequency filters on feed boards10 Sep 2026US 2026/0269444 A1CommScope Italy S.r.l.
- Tunable ceramic waveguide filter27 Aug 2026US 2026/0254084 A1Telefonaktiebolaget LM Ericsson (publ)
- Filter, antenna apparatus, and communication device20 Aug 2026US 2026/0246129 A1Huawei Technologies Co., Ltd.
- Compact wideband pcb bandpass filter using mushroom-shaped resonators13 Aug 2026US 2026/0239526 A1Viettel Group
- A broadband tunable waveguide filter arrangement6 Aug 2026US 2026/0229758 A1Telefonaktiebolaget LM Ericsson (publ)
Most cited
By later US patents
- Quadruple mode filter208US 4,792,771 ACom Dev Ltd. · 1988
- Planar mode converter used in printed microwave integrated circuits180US 6,639,484 B2National Chiao Tung University · 2003
- Dielectric resonator apparatus167US 4,821,006 AMurata Manufacturing Co., Ltd. · 1989
- High TC superconducting monolithic ferroelectric junable b and pass filter154US 5,496,795 A1996
- Electrosurgical apparatus129US 10,080,609 B2Creo Medical Limited · 2018