H01P 1/2138
Using hollow waveguide filters
Official title: {using hollow waveguide filters (H01P1/2131 takes precedence)}
H01P1/2138 (Using hollow waveguide filters) appears on 222 US grants and 175 published applications in this corpus.
Search patents in H01P- Granted patents
- 222
- Published applications
- 175
- Assignees
- 132
- Inventors
- 483
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 7 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 4 |
| 2002 | 7 | 5 |
| 2003 | 5 | 11 |
| 2004 | 6 | 5 |
| 2005 | 8 | 5 |
| 2006 | 5 | 6 |
| 2007 | 2 | 5 |
| 2008 | 5 | 2 |
| 2009 | 1 | 1 |
| 2010 | 4 | 7 |
| 2011 | 5 | 6 |
| 2012 | 2 | 8 |
| 2013 | 4 | 4 |
| 2014 | 8 | 7 |
| 2015 | 6 | 3 |
| 2016 | 6 | 11 |
| 2017 | 7 | 5 |
| 2018 | 9 | 6 |
| 2019 | 4 | 11 |
| 2020 | 10 | 12 |
| 2021 | 10 | 11 |
| 2022 | 6 | 7 |
| 2023 | 7 | 8 |
| 2024 | 8 | 11 |
| 2025 | 7 | 7 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Radio frequency filters including filter banks formed by plural resonators that are covered by feed boards1 Sep 2026US 12,725,896 B2CommScope Italy S.r.l.
- Wideband TEM to TM01 mode converter for microwave plasma systems25 Aug 2026US 12,719,142 B2APPLIED Materials.Inc.
- Four-port diplexer device25 Aug 2026US 12,719,509 B2Lisa Draexlmaier GmbH
- Signal transceiver apparatus, feeding structure, and antenna4 Aug 2026US 12,700,652 B2Huawei Technologies Co., Ltd.
- Self-tuning transmitter combiner comprising a plurality of filters combining with a reactive element at a junction and including a control unit for tuning the filters and reactive element4 Aug 2026US 12,700,844 B2Norsat International Inc.
- A broadband tunable waveguide filter arrangement6 Aug 2026US 2026/0229758 A1Telefonaktiebolaget LM Ericsson (publ)
- Highly-Integrated Antenna Feed Assembly18 Jun 2026US 2026/0171642 A1ViaSat, Inc.
- Duplexer, multiplexer and multiband filter18 Jun 2026US 2026/0172060 A1Telefonaktiebolaget LM Ericsson (publ)
- Dynamic ultra-selective waveguide filter assembly26 Feb 2026US 2026/0058349 A1Northrop Grumman Systems Corporation
- Filter for communication device5 Feb 2026US 2026/0039000 A1Kmw Inc.
Most cited
By later US patents
- Apparatus and methods for communicating utilizing an antenna array364US 10,148,016 B2AT&T Intellectual Property I, L. P. · 2018
- Miniaturized filter assembly122US 5,821,836 AThe Regents of the University of Michigan · 1998
- Method for tuning a summing network of a base station, and a bandpass filter109US 5,949,302 ANokia Telecommunications Oy · 1999
- Ceramic resonator filter with electromagnetic shielding82US 4,646,038 AMotorola, Inc. · 1987
- Modular transmission system and method82US 6,023,612 AThomcast Communications, Inc. · 2000