H02K 21/48
Generators with two or more outputs
H02K21/48 (Generators with two or more outputs) appears on 81 US grants and 43 published applications in this corpus.
Search patents in H02K- Granted patents
- 81
- Published applications
- 43
- Assignees
- 51
- Inventors
- 136
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 2 |
| 2003 | 2 | 0 |
| 2004 | 1 | 1 |
| 2005 | 2 | 2 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 0 | 3 |
| 2010 | 3 | 2 |
| 2011 | 3 | 0 |
| 2012 | 2 | 1 |
| 2013 | 3 | 1 |
| 2014 | 1 | 2 |
| 2015 | 0 | 0 |
| 2016 | 1 | 2 |
| 2017 | 2 | 1 |
| 2018 | 0 | 3 |
| 2019 | 5 | 4 |
| 2020 | 2 | 3 |
| 2021 | 3 | 4 |
| 2022 | 3 | 3 |
| 2023 | 3 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Electric generator having plural stators13 May 2025US 12,301,079 B2The Trustees for the Time Being of the Kmn Fulfilment Trust
- Generator with lap windings and segmented permanent magnets10 Sep 2024US 12,088,159 B2Safran Electrical & Power
- Propulsive electric motor set with electric generator14 May 2024US 11,984,839 B2Airbus Operations GmbH
- Disc-type ironless permanent magnet synchronous generator powered by auxiliary power supply21 Nov 2023US 11,824,412 B2
- Electric drive systems21 Mar 2023US 11,611,256 B2ROLLS-ROYCE plc
- Electrical energy system having different axial lengths for efficient power generation18 Jul 2024US 2024/0243632 A1ROLLS-ROYCE plc
- An electric generator having plural stators29 Jun 2023US 2023/0208262 A1The Trustees for the Time Being of the Kmn Fulfilment Trust
- Disc-type ironless permanent magnet synchronous generator powered by auxiliary power supply22 Jun 2023US 2023/0198327 A1
- Propulsive electric motor set with electric generator13 Oct 2022US 2022/0329181 A1Airbus Operations GmbH
- Power Generator Separating Multiple Electric Sources5 May 2022US 2022/0140665 A1
Most cited
By later US patents
- Controller for permanent magnet generator155US 5,625,276 AColeman Powermate, Inc. · 1997
- Ultra-high speed permanent magnet axial gap alternator with multiple stators127US 4,996,457 AThe United States of America as represented by the United States Department of Energy · 1991
- Load demand throttle control for portable generator and other applications88US 6,018,200 AColeman Powermate, Inc. · 2000
- Versatile AC dynamo-electric machine73US 5,838,085 APrecise Power Corporation · 1998
- Electrical power generators68US 5,793,137 AUltra Electronics Limited · 1998