G01R 25/00
Arrangements for measuring phase angle between a voltage and a current or
Official title: Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
G01R25/00 (Arrangements for measuring phase angle between a voltage and a current or) appears on 837 US grants and 598 published applications in this corpus.
Search patents in G01R- Granted patents
- 837
- Published applications
- 598
- Assignees
- 556
- Inventors
- 1,776
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 10 | 0 |
| 1978 | 13 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 17 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 11 | 0 |
| 1985 | 12 | 0 |
| 1986 | 10 | 0 |
| 1987 | 26 | 0 |
| 1988 | 15 | 0 |
| 1989 | 19 | 0 |
| 1990 | 14 | 0 |
| 1991 | 9 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 9 | 0 |
| 1996 | 14 | 0 |
| 1997 | 14 | 0 |
| 1998 | 15 | 0 |
| 1999 | 10 | 0 |
| 2000 | 15 | 0 |
| 2001 | 13 | 5 |
| 2002 | 9 | 9 |
| 2003 | 7 | 5 |
| 2004 | 10 | 4 |
| 2005 | 7 | 7 |
| 2006 | 10 | 12 |
| 2007 | 6 | 6 |
| 2008 | 6 | 8 |
| 2009 | 6 | 7 |
| 2010 | 9 | 9 |
| 2011 | 11 | 10 |
| 2012 | 10 | 21 |
| 2013 | 9 | 24 |
| 2014 | 20 | 33 |
| 2015 | 30 | 71 |
| 2016 | 31 | 44 |
| 2017 | 48 | 34 |
| 2018 | 47 | 32 |
| 2019 | 37 | 35 |
| 2020 | 42 | 24 |
| 2021 | 31 | 29 |
| 2022 | 21 | 40 |
| 2023 | 30 | 42 |
| 2024 | 34 | 35 |
| 2025 | 37 | 33 |
| 2026 | 21 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01R 25/005Circuits for comparing several input signals and for indicating the result of207
- G01R 25/04Involving adjustment of a phase shifter to produce a predetermined phase difference75
- G01R 25/08Arrangements for measuring phase angle between a voltage and a current or67
- G01R 25/02In circuits having distributed constants36
- G01R 25/06Employing quotient instrument2
Recent patents
- Electrical conductivity detector with phase difference correction22 Sep 2026US 12,742,753 B2Shimadzu Corporation
- Method and apparatus for phase detection1 Sep 2026US 12,724,047 B2Shenzhen Pango Microsystems Co., Ltd
- Shuntless motor control for multi-phase motors25 Aug 2026US 12,719,396 B2Infineon Technologies AG
- Electromagnetically induced grating-based electric field detection system and method18 Aug 2026US 12,710,460 B2Korea Research Institute of Standards and Science
- Measurement apparatus and measurement method7 Jul 2026US 12,674,849 B2Yokogawa Electric Corporation
- Frequency selection optimization in locating a utility line1 Oct 2026US 2026/0299156 A1The Charles Machine Works, Inc.
- Systems and Methods for Duty Cycle Measurement17 Sep 2026US 2026/0276688 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Apparatus for an energy meter6 Aug 2026US 2026/0227432 A1NXP B. V.
- Method for detecting partial discharges in an insulator of an electrical conductor30 Jul 2026US 2026/0219309 A1Schneider Electric Industries SAS
- Rf signal parameter measurement in an integrated circuit fabrication chamber23 Jul 2026US 2026/0213144 A1Lam Research Corporation
Most cited
By later US patents
- Non-contact vital signs monitor227US 4,958,638 AGeorgia Tech Research Corporation · 1990
- Method for determining battery state of charge by measuring A.C. electrical phase angle change212US 3,984,762 AThe United States of America as represented by the Secretary of the Army · 1976
- Method and apparatus for improving the resolution of pulse position modulated communications between an implantable medical device and an external medical device115US 5,522,866 AIntermedics, Inc. · 1996
- Time jitter determining apparatus109US 4,350,879 ACanadian Patents & Dev. Limited · 1982
- Tracking sample and hold phase detector107US 4,751,468 ATektronix, Inc. · 1988