H01P 1/22
Attenuating devices
Official title: Attenuating devices (dissipative terminating devices H01P1/26)
H01P1/22 (Attenuating devices) appears on 374 US grants and 275 published applications in this corpus.
Search patents in H01P- Granted patents
- 374
- Published applications
- 275
- Assignees
- 222
- Inventors
- 698
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 8 | 0 |
| 1978 | 10 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 1 |
| 2002 | 7 | 1 |
| 2003 | 4 | 10 |
| 2004 | 5 | 9 |
| 2005 | 9 | 7 |
| 2006 | 7 | 9 |
| 2007 | 10 | 8 |
| 2008 | 2 | 6 |
| 2009 | 8 | 9 |
| 2010 | 5 | 4 |
| 2011 | 3 | 8 |
| 2012 | 7 | 8 |
| 2013 | 5 | 10 |
| 2014 | 8 | 7 |
| 2015 | 10 | 15 |
| 2016 | 16 | 10 |
| 2017 | 15 | 11 |
| 2018 | 13 | 22 |
| 2019 | 26 | 22 |
| 2020 | 19 | 22 |
| 2021 | 18 | 11 |
| 2022 | 14 | 18 |
| 2023 | 14 | 22 |
| 2024 | 10 | 11 |
| 2025 | 18 | 10 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Signal transmission control device and electronic device including the same18 Aug 2026US 12,712,269 B2Seoul National University R&Db Foundation
- Feed circuit, antenna device, communication device, and communication system utilizing a power divider and phase shift elements11 Aug 2026US 12,706,631 B2Huawei Technologies Co., Ltd.
- Waveguide termination arrangements for array antennas3 Feb 2026US 12,542,372 B2Gapwaves AB
- Phase shifter with controllable attenuation and method for controlling same13 Jan 2026US 12,525,927 B2NXP B. V.
- Electromagnetic wave attenuator and electronic device18 Nov 2025US 12,476,341 B2Kabushiki Kaisha Toshiba
- Anti-vibration waveguide load2 Jul 2026US 2026/0188883 A1Universal Microwave Technology, Inc.
- Tunable waveguide attenuator and measurement setup26 Mar 2026US 2026/0088482 A1Rohde & Schwarz GmbH & Co.KG
- Parallel radiofrequency blanking switch system, apparatus and method26 Mar 2026US 2026/0088841 A1The United States of America as represented by the Secretary of the Navy
- Adjustable gain slope compensator5 Mar 2026US 2026/0066513 A1Qorvo US, Inc.
- Attenuator including nonuniform resistors and apparatus including the same25 Dec 2025US 2025/0392028 A1Industry-Academic Cooperation Foundation, Yonsei University
Most cited
By later US patents
- Method and apparatus for adjusting a field of a signal to mitigate interference470US 9,847,566 B2AT&T Intellectual Property I, L. P. · 2017
- Launcher and coupling system for guided wave mode cancellation442US 9,991,580 B2AT&T Intellectual Property I, L. P. · 2018
- Apparatus and method for guided wave communications using an absorber243US 10,374,281 B2AT&T Intellectual Property I, L. P. · 2019
- Crosstalk cancellation and/or reduction148US 9,293,798 B2Intel Corporation · 2016
- FET monolithic microwave integrated circuit variable attenuator90US 4,890,077 ATeledyne MEC · 1989