H02K 47/18
Ac/ac converters
Official title: AC/AC converters
H02K47/18 (Ac/ac converters) appears on 83 US grants and 70 published applications in this corpus.
Search patents in H02K- Granted patents
- 83
- Published applications
- 70
- Assignees
- 54
- Inventors
- 144
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 5 | 2 |
| 2003 | 0 | 2 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 3 |
| 2013 | 0 | 2 |
| 2014 | 2 | 4 |
| 2015 | 1 | 4 |
| 2016 | 3 | 9 |
| 2017 | 2 | 10 |
| 2018 | 6 | 3 |
| 2019 | 7 | 5 |
| 2020 | 3 | 5 |
| 2021 | 2 | 3 |
| 2022 | 3 | 2 |
| 2023 | 3 | 2 |
| 2024 | 0 | 5 |
| 2025 | 5 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Duplex inverter generator4 Aug 2026US 12,700,786 B2Imperial Industrial Supply Co.
- Assembly comprising a generator and electric motors, for a vehicle air-conditioning or refrigeration system30 Dec 2025US 12,508,911 B2Moteurs Leroy-Somer
- Motor-alternator-motor (MAM) systems and methods for using same30 Dec 2025US 12,512,743 B2
- Pneumatic energy supply power for ultra-high voltage equipment20 May 2025US 12,308,641 B2Suzhou Kangkai Electric Co., Ltd.
- Uninterruptible power supply system with engine start-up6 May 2025US 12,294,238 B2
- Duplex inverter generator2 Jul 2026US 2026/0189118 A1Imperial Industrial Supply Co.
- Power coupling devices for high-temperature superconductors12 Mar 2026US 2026/0074587 A1Microsoft Technology Licensing, LLC
- Multi-port energy storage system and control for laser power supply23 Oct 2025US 2025/0330066 A1
- Electric current generation apparatus with improved efficiency24 Apr 2025US 2025/0132650 A1
- Vertical Propulsion Magnetic Generation Turbine29 Aug 2024US 2024/0291369 A1
Most cited
By later US patents
- Versatile AC dynamo-electric machine73US 5,838,085 APrecise Power Corporation · 1998
- Rotary converter machine for direct transfer of electric energy by flux linkage between windings on a stator pack62US 4,517,471 AAnton Piller GmbH & Co. KG · 1985
- Non-interruptible power supply systems61US 4,168,459 APrecise Power Corporation · 1979
- Versatile AC dynamo-electric machine60US 5,990,590 APrecise Power Corporation · 1999
- A.C. motor-generator47US 4,663,536 APrecise Power Corporation · 1987