H01P 1/207
Hollow waveguide filters
Official title: Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence)
H01P1/207 (Hollow waveguide filters) appears on 1,183 US grants and 1,026 published applications in this corpus.
Search patents in H01P- Granted patents
- 1,183
- Published applications
- 1,026
- Assignees
- 459
- Inventors
- 1,849
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 8 | 0 |
| 1980 | 3 | 0 |
| 1981 | 10 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 11 | 0 |
| 1985 | 5 | 0 |
| 1986 | 13 | 0 |
| 1987 | 14 | 0 |
| 1988 | 19 | 0 |
| 1989 | 12 | 0 |
| 1990 | 5 | 0 |
| 1991 | 10 | 0 |
| 1992 | 4 | 0 |
| 1993 | 11 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 10 | 0 |
| 1997 | 12 | 0 |
| 1998 | 27 | 0 |
| 1999 | 20 | 0 |
| 2000 | 25 | 0 |
| 2001 | 22 | 12 |
| 2002 | 26 | 28 |
| 2003 | 33 | 27 |
| 2004 | 17 | 35 |
| 2005 | 26 | 24 |
| 2006 | 21 | 21 |
| 2007 | 18 | 19 |
| 2008 | 15 | 8 |
| 2009 | 8 | 23 |
| 2010 | 21 | 21 |
| 2011 | 15 | 22 |
| 2012 | 15 | 37 |
| 2013 | 15 | 47 |
| 2014 | 32 | 37 |
| 2015 | 47 | 60 |
| 2016 | 44 | 60 |
| 2017 | 57 | 51 |
| 2018 | 64 | 69 |
| 2019 | 68 | 55 |
| 2020 | 54 | 69 |
| 2021 | 66 | 65 |
| 2022 | 54 | 72 |
| 2023 | 48 | 56 |
| 2024 | 55 | 43 |
| 2025 | 54 | 40 |
| 2026 | 36 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Notch filter6 Oct 2026US 12,756,082 B2Inter-University Research Institute Corporation National Institutes of Natural Sciences
- 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.
- 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)
- Coupler for microwave pyrolysis systems20 Aug 2026US 2026/0242668 A1Pyrowave Inc.
- 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
Most cited
By later US patents
- Magnetic coupling device and methods for use therewith475US 9,793,954 B2AT&T Intellectual Property I, L. P. · 2017
- Quasi-optical waveguide filter228US 4,598,262 ATRW Inc. · 1986
- 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