F03D 9/37
With means for enhancing the air flow within the tower
Official title: with means for enhancing the air flow within the tower, e.g. by heating
F03D9/37 (With means for enhancing the air flow within the tower) appears on 74 US grants and 96 published applications in this corpus.
Search patents in F03D- Granted patents
- 74
- Published applications
- 96
- Assignees
- 43
- Inventors
- 162
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 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 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 3 | 4 |
| 2004 | 0 | 3 |
| 2005 | 1 | 1 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 2 | 6 |
| 2010 | 2 | 8 |
| 2011 | 4 | 8 |
| 2012 | 2 | 7 |
| 2013 | 5 | 3 |
| 2014 | 5 | 2 |
| 2015 | 3 | 4 |
| 2016 | 4 | 4 |
| 2017 | 1 | 3 |
| 2018 | 3 | 2 |
| 2019 | 3 | 3 |
| 2020 | 1 | 4 |
| 2021 | 6 | 8 |
| 2022 | 4 | 4 |
| 2023 | 2 | 2 |
| 2024 | 5 | 8 |
| 2025 | 5 | 3 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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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
- Power system75US 3,936,652 A1976
- Power tower—system and method of using air flow generated by geothermal generated heat to drive turbines generators for the generation of electricity75US 9,574,551 B2GTherm, Inc. · 2017
- Wind and solar powered turbine60US 4,433,544 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1984
- Revolving power tower41US 4,935,639 A1990