G01R 29/18
Indicating phase sequence
Official title: Indicating phase sequence; Indicating synchronism
G01R29/18 (Indicating phase sequence) appears on 190 US grants and 169 published applications in this corpus.
Search patents in G01R- Granted patents
- 190
- Published applications
- 169
- Assignees
- 146
- Inventors
- 443
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 3 | 4 |
| 2004 | 2 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 1 | 5 |
| 2008 | 3 | 5 |
| 2009 | 4 | 3 |
| 2010 | 1 | 11 |
| 2011 | 4 | 7 |
| 2012 | 9 | 13 |
| 2013 | 5 | 13 |
| 2014 | 13 | 11 |
| 2015 | 8 | 10 |
| 2016 | 10 | 12 |
| 2017 | 6 | 3 |
| 2018 | 6 | 7 |
| 2019 | 7 | 10 |
| 2020 | 14 | 8 |
| 2021 | 8 | 9 |
| 2022 | 8 | 10 |
| 2023 | 6 | 7 |
| 2024 | 6 | 4 |
| 2025 | 4 | 8 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for identifying consumer phase connectivity in low-voltage distribution network based on voltage association characteristics19 May 2026US 12,631,672 B2Guangzhou Power Electrical Technology Co., Ltd.
- Phase identification of power distribution systems21 Apr 2026US 12,607,662 B2Mitsubishi Electric Research Laboratories, Inc.
- Method for determining at least one property of a rotational movement of a three-phase rotary current machine in generator operation and electromechanical drive24 Feb 2026US 12,560,638 B2Dormakaba Deutschland GmbH
- System and method of linear state estimation of a distribution network from synchronous smart meter and line sensor24 Feb 2026US 12,562,580 B2Aclara Technologies LLC
- Integrated tool with circuit tracer, receptacle tester, and/or load continuity tester30 Sep 2025US 12,429,530 B2IDEAL Industries, Inc.
- Synchronization of Distribution System Sensor Data Using Phasor Measurement Units3 Sep 2026US 2026/0259253 A1Quanta Technology, LLC
- System and method for detecting mislabeling of electric voltage phase labels in a three phase electric power distribution network9 Jul 2026US 2026/0194563 A1
- System for sensing an rf signal18 Jun 2026US 2026/0169045 A1Rohde & Schwarz GmbH & Co.KG
- Method and system for online passive detection of phase connection of power meters30 Apr 2026US 2026/0118393 A1Eaton Intelligent Power Limited
- Phase sequence indicator circuit12 Mar 2026US 2026/0072067 A1Leviton Manufacturing Co., Inc.
Most cited
By later US patents
- System for detection of the phase of an electrical signal on an alternating circuit power line94US 5,467,011 ANational Rural Electric Cooperative Assn. · 1995
- Phase sequence detector for three-phase AC power system63US 3,976,919 ABorg-Warner Corporation · 1976
- Apparatus and method for identifying the phase of a three phase power line at a remote location48US 5,510,700 ASystems Analysis and Integration, Inc. · 1996
- Alarm system for warning of unbalance or failure of one or more phases of a multi-phase high-current load45US 4,053,876 A1977
- Apparatus and method for identifying cable phase in a three-phase power distribution network45US 7,031,859 B22006