B64C 21/10
Influencing air flow over aircraft surfaces by affecting boundary layer flow: using
Official title: using other surface properties, e.g. roughness
B64C21/10 (Influencing air flow over aircraft surfaces by affecting boundary layer flow: using) appears on 259 US grants and 264 published applications in this corpus.
Search patents in B64C- Granted patents
- 259
- Published applications
- 264
- Assignees
- 146
- Inventors
- 577
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 6 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 3 |
| 2005 | 3 | 3 |
| 2006 | 3 | 4 |
| 2007 | 0 | 5 |
| 2008 | 3 | 9 |
| 2009 | 1 | 8 |
| 2010 | 2 | 15 |
| 2011 | 5 | 7 |
| 2012 | 7 | 7 |
| 2013 | 10 | 8 |
| 2014 | 11 | 15 |
| 2015 | 4 | 6 |
| 2016 | 12 | 24 |
| 2017 | 13 | 21 |
| 2018 | 12 | 14 |
| 2019 | 13 | 20 |
| 2020 | 19 | 20 |
| 2021 | 13 | 17 |
| 2022 | 13 | 17 |
| 2023 | 9 | 16 |
| 2024 | 17 | 10 |
| 2025 | 16 | 8 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Electrostatic/pneumatic actuators for active surfaces213US 6,215,221 B1Honeywell International Inc. · 2001
- Drag reduction article137US 5,133,516 AMinnesota Mining and Manufacturing Company · 1992
- Electrostatic/pneumatic actuators for active surfaces132US 6,288,472 B1Honeywell International Inc. · 2001
- Combined riblet and lebu drag reduction system106US 4,706,910 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1987
- Airfoil-shaped body103US 4,830,315 AUnited Technologies Corporation · 1989