G01R 25/04
Involving adjustment of a phase shifter to produce a predetermined phase difference
Official title: involving adjustment of a phase shifter to produce a predetermined phase difference, e.g. zero difference
G01R25/04 (Involving adjustment of a phase shifter to produce a predetermined phase difference) appears on 75 US grants and 62 published applications in this corpus.
Search patents in G01R- Granted patents
- 75
- Published applications
- 62
- Assignees
- 80
- Inventors
- 181
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 2 |
| 2007 | 0 | 0 |
| 2008 | 2 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 2 |
| 2016 | 2 | 6 |
| 2017 | 6 | 5 |
| 2018 | 3 | 7 |
| 2019 | 5 | 3 |
| 2020 | 4 | 3 |
| 2021 | 3 | 9 |
| 2022 | 6 | 5 |
| 2023 | 8 | 5 |
| 2024 | 2 | 2 |
| 2025 | 4 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Adaptive low-pass filter for zero-crossing detection6 May 2025US 12,294,375 B2STMicroelectronics International N. V.
- Method and device for detecting the phase of a signal via a hybrid coupler, using a reference phase8 Apr 2025US 12,270,842 B2Centre National De La Recherche Scientifique
- Phase characteristic measurement apparatus, signal generator and signal analyzer having same, and phase characteristic measurement method4 Jun 2026US 2026/0153543 A1Anritsu Corporation
- Frequency tracking method and system for ultrasonic transducer and ultrasonic device4 Sep 2025US 2025/0277832 A1Innolcon Medical Technology (Suzhou) Co., Ltd.
- Phase detection26 Jun 2025US 2025/0208179 A1Centre National De La Recherche Scientifique
- Adaptive low-pass filter for zero-crossing detection27 Mar 2025US 2025/0105831 A1STMicroelectronics International N. V.
- Electromagnetically induced grating-based electric field detection system and method24 Oct 2024US 2024/0353459 A1Korea Research Institute of Standards and Science
Most cited
By later US patents
- Microwave moisture measurement using two microwave signals of different frequency and phase shift determination37US 4,727,311 A1988
- Method and apparatus for reflection coefficient measurements30US 4,721,901 AHercules Incorporated · 1988
- Digital phase detector19US 7,061,276 B2Teradyne, Inc. · 2006
- High accuracy phase shift control system15US 4,341,999 AEaton Corporation · 1982
- Microwave antenna apparatus15US 4,962,384 A1990