G01R 21/00
Arrangements for measuring electric power or power factor
Official title: Arrangements for measuring electric power or power factor (G01R7/12 takes precedence)
G01R21/00 (Arrangements for measuring electric power or power factor) appears on 3,221 US grants and 3,080 published applications in this corpus.
Search patents in G01R- Granted patents
- 3,221
- Published applications
- 3,080
- Assignees
- 1,481
- Inventors
- 6,501
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 26 | 0 |
| 1978 | 22 | 0 |
| 1979 | 16 | 0 |
| 1980 | 31 | 0 |
| 1981 | 35 | 0 |
| 1982 | 32 | 0 |
| 1983 | 23 | 0 |
| 1984 | 23 | 0 |
| 1985 | 30 | 0 |
| 1986 | 28 | 0 |
| 1987 | 29 | 0 |
| 1988 | 29 | 0 |
| 1989 | 32 | 0 |
| 1990 | 28 | 0 |
| 1991 | 22 | 0 |
| 1992 | 22 | 0 |
| 1993 | 32 | 0 |
| 1994 | 35 | 0 |
| 1995 | 36 | 0 |
| 1996 | 39 | 0 |
| 1997 | 31 | 0 |
| 1998 | 33 | 0 |
| 1999 | 18 | 0 |
| 2000 | 29 | 0 |
| 2001 | 23 | 10 |
| 2002 | 39 | 32 |
| 2003 | 35 | 29 |
| 2004 | 40 | 46 |
| 2005 | 26 | 39 |
| 2006 | 36 | 38 |
| 2007 | 39 | 39 |
| 2008 | 25 | 49 |
| 2009 | 31 | 62 |
| 2010 | 40 | 88 |
| 2011 | 45 | 72 |
| 2012 | 54 | 101 |
| 2013 | 90 | 180 |
| 2014 | 97 | 238 |
| 2015 | 122 | 298 |
| 2016 | 176 | 261 |
| 2017 | 236 | 191 |
| 2018 | 200 | 184 |
| 2019 | 230 | 184 |
| 2020 | 194 | 200 |
| 2021 | 161 | 159 |
| 2022 | 181 | 129 |
| 2023 | 133 | 123 |
| 2024 | 95 | 134 |
| 2025 | 109 | 107 |
| 2026 | 62 | 87 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01R 21/133Arrangements for measuring electric power or power factor: by using digital technique1,725
- G01R 21/06Arrangements for measuring electric power or power factor: by measuring current and485
- G01R 21/10Arrangements for measuring electric power or power factor: by using square-law characteristics162
- G01R 21/01In circuits having distributed constants133
- G01R 21/001Measuring real or reactive component123
- G01R 21/006Measuring power factor111
- G01R 21/127Arrangements for measuring electric power or power factor: by using pulse modulation107
- G01R 21/08Arrangements for measuring electric power or power factor: by using galvanomagnetic-effect devices102
Recent patents
- Power meter determining an operating state6 Oct 2026US 12,754,220 B2Senva Inc.
- Integrated power monitoring system for transient power management on a per-rail or per-subsystem basis6 Oct 2026US 12,756,319 B1Amazon Technologies, Inc.
- RF outlet power test device6 Oct 2026US 12,756,484 B1VeEX Inc.
- Power detector device and power detection method22 Sep 2026US 12,742,802 B2Sigmastar Technology Ltd.
- Method and system for estimating power consumption and time consumption of electric assisted bicycle8 Sep 2026US 12,728,945 B2Acer Gadget Inc.
- Management system for work machine and management method for work machine8 Oct 2026US 2026/0307527 A1Komatsu Ltd.
- Utility meter with enhanced communication, data storage, and firmware update capabilities8 Oct 2026US 2026/0309758 A1
- Voltage drop and capacity use calculation system8 Oct 2026US 2026/0309759 A1Basarsoft Bilgi Teknolojileri Anonim Sirketi
- Power conversion apparatus and outdoor unit of air conditioner8 Oct 2026US 2026/0312512 A1Mitsubishi Electric Corporation
- Solar panel efficiency detection and improvement8 Oct 2026US 2026/0312538 A1Itron, Inc.
Most cited
By later US patents
- High frequency power measurement1,881US 5,422,567 AValleylab, Inc. · 1995
- Engery management and building automation system884US 5,572,438 ATECO Energy Management Services · 1996
- Power transmission line monitoring system469US 5,006,846 A1991
- System for rate-related control of electrical loads435US 5,696,695 ATeCom AS · 1997
- System and method for home energy monitor and control328US 8,255,090 B2EnergyHub, Inc. · 2012