F03D 9/13
Storing gravitational potential energy
Official title: storing gravitational potential energy
F03D9/13 (Storing gravitational potential energy) appears on 67 US grants and 79 published applications in this corpus.
Search patents in F03D- Granted patents
- 67
- Published applications
- 79
- Assignees
- 35
- Inventors
- 143
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 8 |
| 2010 | 0 | 5 |
| 2011 | 6 | 6 |
| 2012 | 4 | 8 |
| 2013 | 3 | 2 |
| 2014 | 5 | 7 |
| 2015 | 3 | 6 |
| 2016 | 3 | 4 |
| 2017 | 5 | 2 |
| 2018 | 1 | 2 |
| 2019 | 4 | 3 |
| 2020 | 3 | 2 |
| 2021 | 2 | 2 |
| 2022 | 1 | 7 |
| 2023 | 5 | 4 |
| 2024 | 3 | 2 |
| 2025 | 2 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modular wind turbine blade designs31 Mar 2026US 12,590,565 B1
- Generation of electrical power offshore25 Nov 2025US 12,479,536 B2Subsea 7 Norway AS
- Energy harvesting system19 Aug 2025US 12,395,114 B2Vertical Green Energy Ltd
- Hybrid renewable pumped storage hydropower energy storage system22 Oct 2024US 12,123,388 B1
- Subterranean energy storage system9 Jul 2024US 12,030,732 B2Economical Energy Pty Ltd
- Generation of Electrical Power Offshore19 Feb 2026US 2026/0048818 A1
- Reservoir-regulating digital load control29 Jan 2026US 2026/0028958 A1Lone Gull Holdings, Ltd.
- A system and method for generating and storing energy from wind25 Dec 2025US 2025/0389252 A1
- Energy harvesting system24 Oct 2024US 2024/0356480 A1Vertical Green Energy Ltd
- Hybrid Renewable Pumped Storage Hydropower Energy Storage System10 Oct 2024US 2024/0337235 A1
Most cited
By later US patents
- Energy storage system122US 3,996,741 A1976
- System for the obtainment and the regulation of energy starting from air, sea and river currents67US 4,236,866 A1980
- Guided flow wind power machine with tubular fans63US 4,204,126 A1980
- Wind machine58US 4,710,100 A1987
- Energy storage for off peak electricity57US 4,873,828 A1989