B64C 27/14
Direct drive between power plant and rotor hub
B64C27/14 (Direct drive between power plant and rotor hub) appears on 407 US grants and 426 published applications in this corpus.
Search patents in B64C- Granted patents
- 407
- Published applications
- 426
- Assignees
- 138
- Inventors
- 679
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 7 | 4 |
| 2003 | 3 | 2 |
| 2004 | 4 | 4 |
| 2005 | 2 | 7 |
| 2006 | 3 | 5 |
| 2007 | 7 | 9 |
| 2008 | 3 | 7 |
| 2009 | 10 | 9 |
| 2010 | 5 | 9 |
| 2011 | 7 | 4 |
| 2012 | 4 | 7 |
| 2013 | 12 | 8 |
| 2014 | 6 | 17 |
| 2015 | 9 | 12 |
| 2016 | 12 | 22 |
| 2017 | 22 | 76 |
| 2018 | 30 | 42 |
| 2019 | 40 | 37 |
| 2020 | 38 | 57 |
| 2021 | 44 | 24 |
| 2022 | 36 | 22 |
| 2023 | 30 | 22 |
| 2024 | 24 | 6 |
| 2025 | 10 | 6 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Helicopter power plant control158US 3,963,372 AGeneral Motors Corporation · 1976
- Electricity generation in automated aerial vehicles124US 9,550,577 B1Amazon Technologies, Inc. · 2017
- Marine hulls and drives97US 7,984,684 B22011
- Flying car82US 6,745,977 B12004
- Aircraft and torque transmission80US 6,467,726 B12002