B64C 21/04
For blowing
Official title: for blowing
B64C21/04 (For blowing) appears on 229 US grants and 220 published applications in this corpus.
Search patents in B64C- Granted patents
- 229
- Published applications
- 220
- Assignees
- 84
- Inventors
- 380
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 1 |
| 2003 | 2 | 1 |
| 2004 | 3 | 4 |
| 2005 | 0 | 2 |
| 2006 | 1 | 6 |
| 2007 | 2 | 3 |
| 2008 | 1 | 2 |
| 2009 | 4 | 5 |
| 2010 | 6 | 9 |
| 2011 | 5 | 9 |
| 2012 | 7 | 9 |
| 2013 | 9 | 14 |
| 2014 | 4 | 5 |
| 2015 | 18 | 9 |
| 2016 | 5 | 14 |
| 2017 | 12 | 23 |
| 2018 | 12 | 13 |
| 2019 | 14 | 14 |
| 2020 | 20 | 16 |
| 2021 | 11 | 7 |
| 2022 | 11 | 14 |
| 2023 | 9 | 13 |
| 2024 | 13 | 11 |
| 2025 | 13 | 10 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotorcraft with powerplant exhaust sound attenuation25 Aug 2026US 12,715,576 B2Pratt & Whitney Canada Corp.
- Fluidic propulsive system and thrust and lift generator for aerial vehicles4 Aug 2026US 12,698,089 B2Jetoptera, Inc.
- Pneumatic system flow balancing architecture and method23 Jun 2026US 12,663,028 B2The Boeing Company
- Apparatus of vortex generator and spoiler28 Apr 2026US 12,612,155 B1
- Methods for optimizing boundary layer control (BLC) systems and related systems10 Mar 2026US 12,570,394 B2
- Wake Filling for Propeller Noise Reduction13 Aug 2026US 2026/0233829 A1Textron Aviation Inc.
- Methods for optimizing boundary layer control (blc) systems and related systems25 Jun 2026US 2026/0175969 A1
- Vertical take of and landing aircraft with fluidic propulsion system11 Jun 2026US 2026/0159220 A1Jetoptera, Inc.
- Pneumatic collapsible ejectors supply system for aircraft propulsion11 Jun 2026US 2026/0160220 A1Jetoptera, Inc.
- Fluidic propulsive system21 May 2026US 2026/0138751 A1Jetoptera, Inc.
Most cited
By later US patents
- Wing leading edge high lift device92US 4,285,482 AThe Boeing Company · 1981
- Fluid flow control devices77US 5,755,408 A1998
- Method and apparatus for reducing turbulent skin friction69US 4,932,612 A1990
- Modification of fluid flow about bodies and surfaces through virtual aero-shaping of airfoils with synthetic jet actuators63US 6,644,598 B2Georgia Tech Research Corporation · 2003
- Drag reduction method and surface59US 5,133,519 ABoard of Trustees operating Michigan State University · 1992