F03D 9/12
Storing kinetic energy
Official title: storing kinetic energy, e.g. using flywheels
F03D9/12 (Storing kinetic energy) appears on 146 US grants and 154 published applications in this corpus.
Search patents in F03D- Granted patents
- 146
- Published applications
- 154
- Assignees
- 62
- Inventors
- 253
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 5 |
| 2004 | 4 | 3 |
| 2005 | 2 | 5 |
| 2006 | 3 | 2 |
| 2007 | 3 | 4 |
| 2008 | 2 | 4 |
| 2009 | 2 | 3 |
| 2010 | 5 | 18 |
| 2011 | 8 | 8 |
| 2012 | 4 | 8 |
| 2013 | 7 | 10 |
| 2014 | 9 | 9 |
| 2015 | 6 | 12 |
| 2016 | 6 | 9 |
| 2017 | 11 | 7 |
| 2018 | 4 | 7 |
| 2019 | 3 | 10 |
| 2020 | 7 | 6 |
| 2021 | 9 | 6 |
| 2022 | 4 | 8 |
| 2023 | 5 | 2 |
| 2024 | 1 | 3 |
| 2025 | 3 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Energy storage system14 Oct 2025US 12,442,358 B1Star Sailor Energy, Inc.
- Compressed air pipeline power generation device13 May 2025US 12,297,814 B2
- Single and twin turbine fluid stream energy collection and conversion devices1 Apr 2025US 12,264,649 B2
- Wind power plant with power conversion system19 Nov 2024US 12,146,471 B2Siemens Gamesa Renewable Energy Innovation & Technology S.L.
- Windmill hydroelectricity generator19 Sep 2023US 11,761,426 B1
- Method and device for converting wind energy into electrical energy21 May 2026US 2026/0139657 A1SkySails Power GmbH
- Non-imaging non-tracking solar concentrator based combined csp and wave energy and wind energy conversion hybrid thermal energy and electric power cogeneration system26 Feb 2026US 2026/0055756 A1
- Methods and machines for harvesting electricity from fluid flows27 Mar 2025US 2025/0101948 A1
- Super-rated operation for increased wind turbine power with energy storage19 Dec 2024US 2024/0421663 A1University of Virginia Patent Foundation
- Single and twin turbine fluid stream energy collection and conversion devices12 Sep 2024US 2024/0301861 A1
Most cited
By later US patents
- Low-speed directly driven wind turbine109US 6,285,090 B1Jeumont Industrie · 2001
- Electrically powered vehicle94US 4,254,843 A1981
- Tornado-type wind turbine86US 4,070,131 AGrumman Aerospace Corporation · 1978
- Wind turbine82US 7,040,859 B22006
- Wind-powered battery charging system79US 5,680,032 ASpinmotor, Inc. · 1997