B64D 2033/0293
For turboprop engines
Official title: {for turboprop engines}
B64D2033/0293 (For turboprop engines) appears on 74 US grants and 70 published applications in this corpus.
Search patents in B64D- Granted patents
- 74
- Published applications
- 70
- Assignees
- 38
- Inventors
- 165
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 3 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 4 |
| 2015 | 5 | 1 |
| 2016 | 1 | 3 |
| 2017 | 2 | 7 |
| 2018 | 3 | 8 |
| 2019 | 8 | 6 |
| 2020 | 5 | 6 |
| 2021 | 7 | 6 |
| 2022 | 6 | 0 |
| 2023 | 3 | 4 |
| 2024 | 10 | 5 |
| 2025 | 5 | 6 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Overspeed protection for a turbocompressor of an aircraft powerplant assembly12 May 2026US 12,624,664 B1Pratt & Whitney Canada Corp.
- Unducted propeller gas turbine comprising a cooling air channel and a variable bleed valve ejection channel5 May 2026US 12,618,377 B2General Electric Company
- Unducted propulsion system7 Apr 2026US 12,595,760 B2General Electric Company
- Inducing windmilling to allow oil flow during fire-induced emergency state10 Feb 2026US 12,546,232 B1Pratt & Whitney Canada Corp.
- Remote mounted accessory gearbox3 Feb 2026US 12,540,579 B2Rtx Corporation
- Unducted propulsion system30 Jul 2026US 2026/0218650 A1General Electric Company
- Aircraft propulsion system with auxiliary flowpath system30 Jul 2026US 2026/0218655 A1Rtx Corporation
- Propulsor rotor arrangement for open rotor propulsion system2 Jul 2026US 2026/0184421 A1Rtx Corporation
- Nose cone with air scoop for open rotor propulsion system11 Jun 2026US 2026/0160204 A1Rtx Corporation
- Open rotor propulsion system with forward exhaust outlet(s)2 Apr 2026US 2026/0092556 A1Rtx Corporation
Most cited
By later US patents
- Fail-safe, anti-icing system for aircraft engines47US 4,397,431 AAvco Corporation · 1983
- Aircraft engine inlet45US 4,607,657 AGeneral Electric Company · 1986
- Ram air intakes of rotary-wing aircraft turbine engines43US 3,998,048 ASociete Nationale Industrielle Aerospatiale · 1976
- Air intake system for engine35US 4,456,458 AThe De Havilland Aircraft of Canada, Limited · 1984
- Inertial separator27US 3,952,972 AUnited Aircraft of Canada Limited · 1976