G01R 29/16
Measuring asymmetry of polyphase networks
G01R29/16 (Measuring asymmetry of polyphase networks) appears on 88 US grants and 74 published applications in this corpus.
Search patents in G01R- Granted patents
- 88
- Published applications
- 74
- Assignees
- 70
- Inventors
- 204
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 2 |
| 2006 | 0 | 3 |
| 2007 | 3 | 3 |
| 2008 | 2 | 2 |
| 2009 | 0 | 2 |
| 2010 | 3 | 6 |
| 2011 | 1 | 0 |
| 2012 | 3 | 5 |
| 2013 | 2 | 7 |
| 2014 | 3 | 7 |
| 2015 | 6 | 3 |
| 2016 | 4 | 3 |
| 2017 | 6 | 1 |
| 2018 | 1 | 2 |
| 2019 | 3 | 3 |
| 2020 | 3 | 3 |
| 2021 | 2 | 5 |
| 2022 | 4 | 3 |
| 2023 | 7 | 5 |
| 2024 | 3 | 3 |
| 2025 | 3 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Detection of loss of neutral10 Mar 2026US 12,571,823 B2Sagemcom Energy & Telecom SAS
- Automatic assessment of electrical unbalance on three-phase loads24 Feb 2026US 12,560,637 B2Schneider Electric USA, Inc.
- Fault detection circuit28 Oct 2025US 12,455,310 B2Toyota Jidosha Kabushiki Kaisha
- Solenoid-based voltage imbalance protection23 Sep 2025US 12,424,839 B2Schneider Electric USA, Inc.
- Induction machine with localized voltage unbalance compensation29 Apr 2025US 12,289,071 B2The Florida State University Research Foundation, Inc.
- Electric meter with detection system30 Jul 2026US 2026/0219305 A1Greentec International Limited
- Automatic assessment of electrical unbalance on three-phase loads18 Sep 2025US 2025/0290962 A1Schneider Electric USA, Inc.
- Method for identifying a defect in an electrical component of an energy installation, generator unit, energy installation, computer-implemented method and computer program product31 Jul 2025US 2025/0244408 A1Nordex Energy GmbH
- Solenoid-based voltage imbalance protection4 Jul 2024US 2024/0222953 A1Schneider Electric USA, Inc.
- Fault detection circuit9 May 2024US 2024/0151760 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Three-phase electrical power measurement system including three transformers and a measurement circuit to calculate the power thereof49US 6,373,238 B2Veris Industries, LLC · 2002
- Protective relaying methods and apparatus41US 4,398,232 AWestinghouse Electric Corp. · 1983
- Method and apparatus for monitoring line voltage in a polyphase source24US 4,210,948 AAllen-Bradley Company, Inc. · 1980
- Mains phase determination23US 5,617,329 ARemote Metering Systems Ltd. · 1997
- Apparatus and method for determining a faulted phase of a three-phase ungrounded power system20US 7,345,488 B2Schweitzer Engineering Laboratories, Inc. · 2008