F05B 2240/911
Already existing for a prior purpose
Official title: already existing for a prior purpose
F05B2240/911 (Already existing for a prior purpose) appears on 321 US grants and 443 published applications in this corpus.
Search patents in F05B- Granted patents
- 321
- Published applications
- 443
- Assignees
- 166
- Inventors
- 624
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 6 |
| 2004 | 3 | 2 |
| 2005 | 1 | 6 |
| 2006 | 5 | 14 |
| 2007 | 3 | 17 |
| 2008 | 9 | 27 |
| 2009 | 17 | 43 |
| 2010 | 13 | 44 |
| 2011 | 17 | 37 |
| 2012 | 23 | 33 |
| 2013 | 25 | 20 |
| 2014 | 22 | 18 |
| 2015 | 11 | 17 |
| 2016 | 13 | 16 |
| 2017 | 11 | 12 |
| 2018 | 10 | 22 |
| 2019 | 14 | 21 |
| 2020 | 13 | 15 |
| 2021 | 8 | 7 |
| 2022 | 8 | 17 |
| 2023 | 10 | 9 |
| 2024 | 12 | 13 |
| 2025 | 14 | 17 |
| 2026 | 8 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for installing wind power generator and wind power generation system29 Sep 2026US 12,747,720 B2Toyota Jidosha Kabushiki Kaisha
- Tide- and wind-powered turbine, conversion and storage system16 Jun 2026US 12,655,826 B2
- Vertical wind turbine with external shroud comprising first and second shroud wings26 May 2026US 12,638,003 B2
- Wind power generation structure and method for vertiport28 Apr 2026US 12,612,896 B2Hyundai Motor Company
- Communication apparatus and base station antenna feeder system28 Apr 2026US 12,614,837 B2Huawei Technologies Co., Ltd.
- Hybrid solar chimney23 Jul 2026US 2026/0210331 A1SüLeyman Demirel üNiversitesi Idari Ve Mali Isler Daire Baskanligi Genel Sekreterlik
- Systems and methods for harvesting energy from a flush cycle of a toilet16 Jul 2026US 2026/0204983 A1The Boeing Company
- Vertical axis wind turbine guide and associated system and method26 Mar 2026US 2026/0085654 A1Youngstown State University
- Plenum resident wind turbine sustainable energy generating system26 Mar 2026US 2026/0085658 A1
- Solar Vortex Clamshell Greenhouse12 Mar 2026US 2026/0071608 A1
Most cited
By later US patents
- System for the obtaining of energy by fluid flows resembling a natural cyclone or anti-cyclone149US 4,452,046 A1984
- Systems, devices and methods for electricity provision, usage monitoring, analysis, and enabling improvements in efficiency139US 8,849,471 B2Moixa Energy Holdings Limited · 2014
- Hybrid energy recovery system101US 6,172,429 B22001
- Hybrid energy recovery system89US 6,097,104 A2000
- Tornado-type wind turbine86US 4,070,131 AGrumman Aerospace Corporation · 1978