G01R 21/1331
Measuring real or reactive component, measuring apparent energy
Official title: {Measuring real or reactive component, measuring apparent energy}
G01R21/1331 (Measuring real or reactive component, measuring apparent energy) appears on 155 US grants and 142 published applications in this corpus.
Search patents in G01R- Granted patents
- 155
- Published applications
- 142
- Assignees
- 132
- Inventors
- 410
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 5 |
| 2003 | 0 | 1 |
| 2004 | 2 | 6 |
| 2005 | 4 | 2 |
| 2006 | 1 | 2 |
| 2007 | 3 | 1 |
| 2008 | 3 | 5 |
| 2009 | 1 | 1 |
| 2010 | 4 | 5 |
| 2011 | 3 | 3 |
| 2012 | 2 | 4 |
| 2013 | 3 | 2 |
| 2014 | 2 | 4 |
| 2015 | 6 | 13 |
| 2016 | 4 | 7 |
| 2017 | 4 | 9 |
| 2018 | 10 | 5 |
| 2019 | 10 | 13 |
| 2020 | 8 | 12 |
| 2021 | 10 | 13 |
| 2022 | 7 | 5 |
| 2023 | 8 | 8 |
| 2024 | 9 | 8 |
| 2025 | 7 | 6 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System for identifying electrical devices4 Aug 2026US 12,699,122 B2Source To Site Accessories Limited
- Measurement apparatus and measurement method19 May 2026US 12,631,673 B2Yokogawa Electric Corporation
- Power-meter apparatus, circuits and methods13 Jan 2026US 12,523,686 B2NXP USA, Inc.
- Sensor-based energy management enclosure and distributed energy resource management based on sensor data18 Nov 2025US 12,474,382 B2Apparent Labs, LLC
- Real time live line measurement of metrological properties of current transformers3 Jun 2025US 12,320,866 B2
- Battery swell detection and adaptive antenna tuning26 Feb 2026US 2026/0058231 A1Meta Platforms Technologies, LLC
- Median filter to prevent sub-cycle nuisance triggering in an electrical power system28 Aug 2025US 2025/0271472 A1Eaton Intelligent Power Limited
- Intelligent non-intrusive load monitoring system28 Aug 2025US 2025/0271474 A1Purdue Research Foundation
- Non-Intrusive, In-Situ Power Measurement Method3 Jul 2025US 2025/0216476 A1The Florida State University Research Foundation, Inc.
- Real time live line measurement of current and voltage transformers5 Jun 2025US 2025/0180613 A1
Most cited
By later US patents
- Non-intrusive appliance monitor apparatus159US 4,858,141 AElectric Power Research Institute, Inc. · 1989
- Power meter for determining parameters of muliphase power lines150US 5,736,847 ACD Power Measurement Limited · 1998
- Transient event detector for use in nonintrusive load monitoring systems134US 5,483,153 AMassachusetts Institute of Technology · 1996
- Electronic metering device including automatic service sensing130US 5,631,554 ASchlumberger Industries · 1997
- Method for determining electrical energy consumption126US 5,229,713 AGeneral Electric Company · 1993