F03D 9/25
The apparatus being an electrical generator
Official title: the apparatus being an electrical generator (F03D9/22 takes precedence)
F03D9/25 (The apparatus being an electrical generator) appears on 3,644 US grants and 4,553 published applications in this corpus.
Search patents in F03D- Granted patents
- 3,644
- Published applications
- 4,553
- Assignees
- 1,256
- Inventors
- 6,261
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 20 | 0 |
| 1978 | 17 | 0 |
| 1979 | 17 | 0 |
| 1980 | 18 | 0 |
| 1981 | 14 | 0 |
| 1982 | 21 | 0 |
| 1983 | 15 | 0 |
| 1984 | 22 | 0 |
| 1985 | 24 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 9 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 7 | 0 |
| 1993 | 9 | 0 |
| 1994 | 10 | 0 |
| 1995 | 10 | 0 |
| 1996 | 13 | 0 |
| 1997 | 8 | 0 |
| 1998 | 12 | 0 |
| 1999 | 7 | 0 |
| 2000 | 20 | 0 |
| 2001 | 20 | 6 |
| 2002 | 21 | 29 |
| 2003 | 26 | 55 |
| 2004 | 33 | 68 |
| 2005 | 48 | 66 |
| 2006 | 67 | 102 |
| 2007 | 69 | 113 |
| 2008 | 74 | 188 |
| 2009 | 76 | 178 |
| 2010 | 116 | 331 |
| 2011 | 154 | 347 |
| 2012 | 204 | 314 |
| 2013 | 204 | 297 |
| 2014 | 209 | 260 |
| 2015 | 217 | 375 |
| 2016 | 222 | 313 |
| 2017 | 245 | 210 |
| 2018 | 220 | 211 |
| 2019 | 202 | 182 |
| 2020 | 197 | 198 |
| 2021 | 159 | 182 |
| 2022 | 138 | 129 |
| 2023 | 110 | 131 |
| 2024 | 138 | 119 |
| 2025 | 109 | 82 |
| 2026 | 51 | 67 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multiple blade wind turbine22 Sep 2026US 12,742,437 B2
- Wind power plant22 Sep 2026US 12,744,391 B2Vestas Wind Systems A/S
- Method and controller arrangement for operating a wind turbine farm15 Sep 2026US 12,736,028 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Powertrain mounting for planetary transmission15 Sep 2026US 12,736,030 B2Flender GmbH
- Wound rotor for wind turbine generators8 Sep 2026US 12,732,054 B2Timken Gears & Services Inc.
- Wind Power Generation Device8 Oct 2026US 2026/0309125 A1
- Coil support assembly having coil support structures joined together via respective joint structures and methods of assembling same8 Oct 2026US 2026/0311931 A1GE Vernova Renovables Espana, S.L.
- A generator for use in a wind turbine8 Oct 2026US 2026/0312460 A1Vestas Wind Systems A/S
- Sealed dual bearing enclosure for a generator of a vertical axis wind turbine1 Oct 2026US 2026/0298203 A1
- Upper hub and electric sunshade umbrella including the same17 Sep 2026US 2026/0272130 A1Linhai Zhongtian Electronic Appliance Co., Ltd
Most cited
By later US patents
- Islanding-operation prevention apparatus, and dispersed power generation apparatus and power generation system using the same282US 5,686,766 ACanon Kabushiki Kaisha · 1997
- Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operation266US 5,225,712 AU.S. Windpower, Inc. · 1993
- Fluid powered electrical generator260US 4,720,640 ATurboStar, Inc. · 1988
- System, method and computer program product for enhancing commercial value of electrical power produced from a renewable energy power production facility260US 6,512,966 B2ABB AB · 2003
- Variable speed wind turbine245US 5,083,039 AU.S. Windpower, Inc. · 1992