B64C 27/43
See-saw type, i.e. two-bladed rotor
Official title: see-saw type, i.e. two-bladed rotor
B64C27/43 (See-saw type, i.e. two-bladed rotor) appears on 39 US grants and 33 published applications in this corpus.
Search patents in B64C- Granted patents
- 39
- Published applications
- 33
- Assignees
- 32
- Inventors
- 93
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 2 | 2 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 3 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 3 | 3 |
| 2019 | 3 | 1 |
| 2020 | 0 | 0 |
| 2021 | 2 | 0 |
| 2022 | 0 | 2 |
| 2023 | 3 | 7 |
| 2024 | 2 | 2 |
| 2025 | 3 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Drive unit for a rotary-wing aircraft, and rotary-wing aircraft5 May 2026US 12,617,525 B2Flynow Aviation GmbH
- Rotor assembly25 Nov 2025US 12,479,570 B2Supernal, LLC
- Teetering rotor yoke with pitched arms18 Nov 2025US 12,473,084 B1Textron Innovations Inc.
- Propulsor assembly of an electric aircraft27 May 2025US 12,312,066 B2Beta Air, LLC
- Single-blade aircraft rotor21 May 2024US 11,987,347 B2Hutchinson
- Flybar Apparatus30 Jul 2026US 2026/0217394 A1University of Washington
- Propulsor drive shaft with branched portion23 Jul 2026US 2026/0208859 A1Beta Air, LLC
- Propulsor assembly of an electric aircraft3 Oct 2024US 2024/0326983 A1Beta Air, LLC
- Combined cyclic and teeter system for an evtol aircraft29 Feb 2024US 2024/0067330 A1Beta Air, LLC
- Teetering propulsor assembly of an electric vertical takeoff and landing aircraft28 Dec 2023US 2023/0415885 A1Beta Air, LLC
Most cited
By later US patents
- Main rotor system for model helicopters58US 5,879,131 A1999
- Autogyro aircraft52US 5,301,900 A1994
- Elastomeric system for mounting a helicopter rotor40US 4,522,563 ABell Helicopter Textron Inc. · 1985
- Collective pitch change system for teter-bar type gyroplane rotary wing aircraft36US 4,741,672 A1988
- Rotor and aircraft passively stable in hover33US 7,204,453 B2Proxflyer AS · 2007