G01R 21/006
Measuring power factor
Official title: {Measuring power factor}
G01R21/006 (Measuring power factor) appears on 111 US grants and 110 published applications in this corpus.
Search patents in G01R- Granted patents
- 111
- Published applications
- 110
- Assignees
- 101
- Inventors
- 248
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 2 |
| 2006 | 2 | 2 |
| 2007 | 1 | 1 |
| 2008 | 2 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 3 | 3 |
| 2013 | 0 | 9 |
| 2014 | 2 | 5 |
| 2015 | 6 | 18 |
| 2016 | 7 | 8 |
| 2017 | 14 | 7 |
| 2018 | 7 | 5 |
| 2019 | 6 | 10 |
| 2020 | 6 | 11 |
| 2021 | 8 | 5 |
| 2022 | 9 | 8 |
| 2023 | 7 | 4 |
| 2024 | 3 | 0 |
| 2025 | 4 | 3 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power meter determining an operating state6 Oct 2026US 12,754,220 B2Senva Inc.
- Building equipment with predictive control19 May 2026US 12,631,357 B2Tyco Fire & Security GmbH
- Apparatus for measure of quantity and associated method of manufacturing14 Apr 2026US 12,601,766 B2
- Inductive power transfer system and method16 Sep 2025US 12,415,429 B2Auckland Uniservices Limited
- Device, method and system to indicate an amount of a load current provided by power supply units8 Jul 2025US 12,352,789 B2Intel Corporation
- Methods And Apparatus For Signal Design And Sequence Configuration In An Integrated Sensing And Communication System24 Sep 2026US 2026/0291624 A1MediaTek Singapore Pte. Ltd.
- Building equipment with predictive control10 Sep 2026US 2026/0266491 A1Tyco Fire & Security GmbH
- Power device and a method for determining whether a load is present10 Sep 2026US 2026/0266879 A1Cyber Power Systems, Inc.
- Method for accounting for power loss2 Jul 2026US 2026/0186032 A1BH EVS Co., Ltd.
- Inductive power transfer system and method18 Dec 2025US 2025/0381858 A1Auckland Uniservices Limited
Most cited
By later US patents
- Power factor control system for AC induction motors106US 4,052,648 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1977
- Harmonic-adjusted power factor meter94US 5,212,441 ABasic Measuring Instruments · 1993
- Programmable multi-channel load profile recorder and method of recording electrical energy metering quantities therein81US 5,525,898 AGeneral Electric Company · 1996
- Harmonic-adjusted power factor meter79US 5,302,890 ABasic Measuring Instruments · 1994
- Monitoring power-related parameters in a power distribution unit68US 8,321,163 B2Server Technology, Inc. · 2012