B64C 21/025
For simultaneous blowing and sucking
Official title: {for simultaneous blowing and sucking}
B64C21/025 (For simultaneous blowing and sucking) appears on 131 US grants and 127 published applications in this corpus.
Search patents in B64C- Granted patents
- 131
- Published applications
- 127
- Assignees
- 68
- Inventors
- 256
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 4 |
| 2003 | 2 | 2 |
| 2004 | 2 | 1 |
| 2005 | 3 | 3 |
| 2006 | 1 | 1 |
| 2007 | 2 | 3 |
| 2008 | 1 | 2 |
| 2009 | 0 | 6 |
| 2010 | 1 | 7 |
| 2011 | 3 | 3 |
| 2012 | 4 | 6 |
| 2013 | 4 | 2 |
| 2014 | 6 | 3 |
| 2015 | 2 | 3 |
| 2016 | 2 | 5 |
| 2017 | 2 | 7 |
| 2018 | 3 | 7 |
| 2019 | 4 | 12 |
| 2020 | 8 | 10 |
| 2021 | 11 | 6 |
| 2022 | 9 | 8 |
| 2023 | 9 | 10 |
| 2024 | 10 | 10 |
| 2025 | 6 | 2 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Reduction of turbomachinery noise149US 6,004,095 AMassachusetts Institute of Technology · 1999
- Method and apparatus for reducing turbulent skin friction69US 4,932,612 A1990
- Aerodynamic low drag structure65US 5,743,488 AShort Brothers PLC · 1998
- Helicopter lifting and propelling apparatus49US 4,169,567 A1979
- Low drag inlet design using injected duct flow44US 5,934,611 ANorthrop Grumman Corporation · 1999