G05F 3/04
Wherein the variable is ac
Official title: wherein the variable is AC
G05F3/04 (Wherein the variable is ac) appears on 104 US grants and 67 published applications in this corpus.
Search patents in G05F- Granted patents
- 104
- Published applications
- 67
- Assignees
- 78
- Inventors
- 174
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 3 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 5 |
| 2014 | 7 | 12 |
| 2015 | 6 | 9 |
| 2016 | 10 | 9 |
| 2017 | 6 | 6 |
| 2018 | 7 | 6 |
| 2019 | 8 | 3 |
| 2020 | 4 | 2 |
| 2021 | 0 | 0 |
| 2022 | 2 | 3 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Transmission and distribution coordination for distributed energy resources integration to electricity markets17 Jun 2025US 12,332,678 B2Midcontinent Independent System Operator, Inc.
- Constant voltage circuit for improvement of load transient response with stable operation in high frequency, and electronic device therewith5 Dec 2023US 11,835,977 B2Nisshinbo Micro Devices Inc.
- Micro-stepping cascading voltage regulator2 Aug 2022US 11,402,862 B2
- Intelligent current control apparatus5 Apr 2022US 11,292,357 B2Delta Electronics, Inc.
- Duty cycle modulated universal binary input circuit with reinforced isolation8 Dec 2020US 10,862,298 B2Schweitzer Engineering Laboratories, Inc.
- Electrical transformer with resonant primary and inductive secondary and its manufacturing method17 Jul 2025US 2025/0232908 A1Reson Energy Ltda
- Micro-Stepping Cascading Voltage Regulator4 Jan 2024US 2024/0004415 A1
- Transmission and distribution coordination for distributed energy resources integration to electricity markets21 Jul 2022US 2022/0229459 A1Midcontinent Independent System Operator, Inc.
- Constant voltage circuit for improvement of load transient response with stable operation in high frequency, and electronic device therewith23 Jun 2022US 2022/0197320 A1Nisshinbo Micro Devices Inc.
- Micro-Stepping Cascading Voltage Regulator3 Feb 2022US 2022/0035395 A1
Most cited
By later US patents
- Self-regulated transformer-inductor with air gaps65US 4,766,365 AHydro-Quebec · 1988
- Universal power control device60US 9,419,435 B2Pass & Seymour, Inc. · 2016
- Controlled ferroresonant transformer regulated power supply58US 3,965,408 AInternational Business Machines Corporation · 1976
- Universal power control device58US 9,184,590 B2Pass & Seymour, Inc. · 2015
- Stabilized power supplies53US 4,019,122 ATelcon-Magnetic Cores Limited · 1977