B64C 21/02
Influencing air flow over aircraft surfaces by affecting boundary layer flow: by
Official title: by use of slot, ducts, porous areas or the like
B64C21/02 (Influencing air flow over aircraft surfaces by affecting boundary layer flow: by) appears on 627 US grants and 590 published applications in this corpus.
Search patents in B64C- Granted patents
- 627
- Published applications
- 590
- Assignees
- 195
- Inventors
- 998
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 13 | 0 |
| 1999 | 9 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 0 |
| 2002 | 6 | 5 |
| 2003 | 4 | 4 |
| 2004 | 6 | 10 |
| 2005 | 6 | 13 |
| 2006 | 8 | 10 |
| 2007 | 10 | 11 |
| 2008 | 2 | 8 |
| 2009 | 8 | 18 |
| 2010 | 12 | 24 |
| 2011 | 10 | 15 |
| 2012 | 16 | 18 |
| 2013 | 15 | 24 |
| 2014 | 18 | 11 |
| 2015 | 24 | 21 |
| 2016 | 18 | 35 |
| 2017 | 29 | 46 |
| 2018 | 22 | 37 |
| 2019 | 30 | 40 |
| 2020 | 45 | 55 |
| 2021 | 46 | 42 |
| 2022 | 45 | 36 |
| 2023 | 32 | 35 |
| 2024 | 45 | 32 |
| 2025 | 28 | 22 |
| 2026 | 19 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Cavity acoustic tones suppression11 Aug 2026US 12,703,480 B2BAE SYSTEMS plc
- Low Drag Heat Exchanger17 Sep 2026US 2026/0274430 A1Textron Aviation Inc.
- Industrial aerial robot systems and methods20 Aug 2026US 2026/0242078 A1
- Industrial aerial robot systems and methods20 Aug 2026US 2026/0242079 A1
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Most cited
By later US patents
- Synthetic jet actuator and applications thereof162US 5,758,823 AGeorgia Tech Research Corporation · 1998
- Reduction of turbomachinery noise149US 6,004,095 AMassachusetts Institute of Technology · 1999
- Synthetic jet actuators for cooling heated bodies and environments132US 6,123,145 AGeorgia Tech Research Corporation · 2000
- Aircraft gas turbine engine bleed air energy recovery apparatus119US 5,137,230 AGeneral Electric Company · 1992
- Anti-icing system for aircraft118US 5,114,100 AThe Boeing Company · 1992