H01P 1/222
Waveguide attenuators
Official title: {Waveguide attenuators (H01P1/23 takes precedence)}
H01P1/222 (Waveguide attenuators) appears on 52 US grants and 42 published applications in this corpus.
Search patents in H01P- Granted patents
- 52
- Published applications
- 42
- Assignees
- 42
- Inventors
- 131
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 4 | 4 |
| 2006 | 2 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 2 | 4 |
| 2016 | 3 | 1 |
| 2017 | 2 | 3 |
| 2018 | 3 | 6 |
| 2019 | 5 | 2 |
| 2020 | 2 | 5 |
| 2021 | 3 | 1 |
| 2022 | 1 | 2 |
| 2023 | 3 | 3 |
| 2024 | 1 | 3 |
| 2025 | 5 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Waveguide termination arrangements for array antennas3 Feb 2026US 12,542,372 B2Gapwaves AB
- Electromagnetic wave attenuator and electronic device18 Nov 2025US 12,476,341 B2Kabushiki Kaisha Toshiba
- Semiconductor system with waveguide assembly with RF signal impedance controllable by applied electromagnetic radiation23 Sep 2025US 12,426,383 B2Purdue Research Foundation
- Attenuation apparatus and test system29 Jul 2025US 12,374,766 B2Calterah Semiconductor Technology (Shanghai) Co., Ltd.
- Waveguide slide screw tuner and method1 Jul 2025US 12,347,916 B1
- 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
- Semiconductor system with waveguide assembly with rf signal impedance controllable by applied electromagnetic radiation10 Jul 2025US 2025/0228015 A1Purdue Research Foundation
- Waveguide termination arrangements for array antennas31 Oct 2024US 2024/0364017 A1Gapwaves AB
- Reduced Kapitza Resistance Microwave Filter for Cryogenic Environments20 Jun 2024US 2024/0204386 A1International Business Machines Corporation
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
- Programmable amplitude and phase controller7US 9,960,472 B12018
- Waveguide6US 4,661,787 ASpinner GmbH, Elektotechnische Fabrik · 1987
- Continuously tunable waveguide attenuator5US 6,985,047 B2Harris Corporation · 2006
- Reduced kapitza resistance microwave filter for cryogenic environments4US 10,897,069 B2International Business Machines Corporation · 2021