G05F 1/70
Regulating power factor
Official title: Regulating power factor; Regulating reactive current or power
G05F1/70 (Regulating power factor) appears on 390 US grants and 343 published applications in this corpus.
Search patents in G05F- Granted patents
- 390
- Published applications
- 343
- Assignees
- 247
- Inventors
- 783
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 11 | 1 |
| 2002 | 10 | 2 |
| 2003 | 2 | 2 |
| 2004 | 8 | 14 |
| 2005 | 8 | 14 |
| 2006 | 15 | 20 |
| 2007 | 13 | 14 |
| 2008 | 9 | 15 |
| 2009 | 16 | 13 |
| 2010 | 12 | 21 |
| 2011 | 8 | 17 |
| 2012 | 15 | 9 |
| 2013 | 21 | 28 |
| 2014 | 16 | 34 |
| 2015 | 21 | 14 |
| 2016 | 19 | 7 |
| 2017 | 24 | 13 |
| 2018 | 12 | 23 |
| 2019 | 24 | 19 |
| 2020 | 22 | 24 |
| 2021 | 13 | 10 |
| 2022 | 16 | 8 |
| 2023 | 6 | 7 |
| 2024 | 10 | 5 |
| 2025 | 9 | 6 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Secure controllers for replaceable print apparatus components21 Jul 2026US 12,687,915 B2Hewlett-Packard Development Company, L. P.
- Methods and systems for solar photovoltaic automatic voltage regulation under extreme weather conditions4 Nov 2025US 12,461,548 B2King Fahd University of Petroleum and Minerals
- System and method for a charging station12 Aug 2025US 12,386,376 B2Transportation IP Holdings, LLC
- Reactive power compensation device8 Jul 2025US 12,355,245 B2Mitsubishi Electric Corporation
- Power factor correction circuit15 Apr 2025US 12,278,559 B2DRP Holdings LLC
- Power factor correction circuit17 Sep 2026US 2026/0280418 A1DRP Holdings LLC
- Application-specific ai-enabled energy storage appliances4 Jun 2026US 2026/0154091 A1Lyten, Inc.
- System and method for a charging station5 Mar 2026US 2026/0064148 A1Transportation IP Holdings, LLC
- Method and Apparatus for Controlling Electric System25 Dec 2025US 2025/0392238 A1ABB Schweiz AG
- Secure controllers for replaceable print apparatus components21 Aug 2025US 2025/0264930 A1Hewlett-Packard Development Company, L. P.
Most cited
By later US patents
- Power line communication using power factor correction circuits288US 7,205,749 B2Texas Instruments Incorporated · 2007
- Automatic power factor corrector170US 7,142,997 B1Tripac Systems, Inc. · 2006
- Controlled frequency power factor correction circuit and method145US 6,970,365 B2JPMorgan Chase Bank, N. A. · 2005
- Power factor correction with carrier control and input voltage sensing142US 6,657,417 B1Champion Microelectronic Corp. · 2003
- Low line harmonic AC to DC power supply107US 5,638,265 A1997