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Class Information
Number: 244/6
Name: Aeronautics > Aircraft, heavier-than-air > Airplane and helicopter sustained
Description: Aeronautical machines having provision for sustentation in part or entirely by aerodynamic action on airfoils in fixed relation to the machines, having also provision for sustentation or vertical lift by means of screw propellers arranged to develop a substantial component of thrust in a vertical direction.










Sub-classes under this class:

Class Number Class Name Patents
244/7R Convertible 104


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8702031 VTOL twin fuselage amphibious aircraft with tilt-center wing, engine and rotor Apr. 22, 2014
8690096 Aircraft with dual flight regimes Apr. 8, 2014
8668162 Apparatus and method for roll moment equalization at high advance ratios for rotary wing aircraft Mar. 11, 2014
8640983 Rotor hub and controls for multi-bladed rotor system Feb. 4, 2014
8640985 Co-rotating stacked rotor disks for improved hover performance Feb. 4, 2014
8636473 Differential pitch control to optimize co-rotating stacked rotor performance Jan. 28, 2014
8583295 Method of controlling and regulating the deflection angle of a tailplane in a hybrid helicopter Nov. 12, 2013
8540184 Long-range aircraft with high forward speed in cruising flight Sep. 24, 2013
8485464 Personal aircraft Jul. 16, 2013
8442740 Passing from a non-synchronized state between an engine and a rotor to a synchronized state May. 14, 2013
8424798 Aircraft with helicopter rotor, thrust generator and assymetric wing configuration Apr. 23, 2013
8403255 Compound aircraft with autorotation Mar. 26, 2013
8393564 Personal aircraft Mar. 12, 2013
8376266 Method of controlling a hybrid helicopter in yaw, and a hybrid helicopter provided with a yaw control device suitable for implementing said method Feb. 19, 2013
8336808 Aircraft having helicopter rotor and front mounted propeller Dec. 25, 2012
8272599 Control lever assembly for a tilt-rotor aircraft Sep. 25, 2012
8251308 Bottom blade type trefoil flight vehicle Aug. 28, 2012
8240617 Variable damping of haptic feedback for a flight-attitude changing linkage of an aircraft Aug. 14, 2012
8205821 Engine propulsion system and methods of assembling the same Jun. 26, 2012
8181901 Fast hybrid helicopter with long range and proportional drive to the rotor and the propeller May. 22, 2012
8170728 Rotorcraft control system May. 1, 2012
8113460 Fast hybrid helicopter with long range and an optimized lift rotor Feb. 14, 2012
8070089 Hybrid helicopter that is fast and has long range Dec. 6, 2011
8070090 Stop-rotor rotary wing aircraft Dec. 6, 2011
8056866 Air-vehicle augmented kinesthetic control system Nov. 15, 2011
8052094 Fast hybrid helicopter with long range with longitudinal trim control Nov. 8, 2011
7871032 Helicopter Jan. 18, 2011
7857252 Rotor/wing dual mode hub fairing system Dec. 28, 2010
7789341 Rotary wing aircraft having a non-rotating structural backbone and a rotor blade pitch controller Sep. 7, 2010
7766274 Active maple seed flyer Aug. 3, 2010
7661624 Aerodynamic lifting-thrusting propulsion device Feb. 16, 2010
7600711 Flexible ducting system including an articulable sealed joint Oct. 13, 2009
7546975 Tandem rotor wing rotational position control system Jun. 16, 2009
7448571 Rotor collective pitch VS Mu to control flapping and mast/rotor tilt to control rotor RPM Nov. 11, 2008
7438259 Compound aircraft control system and method Oct. 21, 2008
7412825 Flow path splitter duct Aug. 19, 2008
7147182 Gas-powered tip-jet-driven tilt-rotor compound VTOL aircraft Dec. 12, 2006
7143973 Avia tilting-rotor convertiplane Dec. 5, 2006
7137589 Compound helicopter with combined wings and landing struts Nov. 21, 2006
7036768 Multi-purpose airship May. 2, 2006
7014142 Low-drag rotor/wing flap Mar. 21, 2006
6974105 High performance VTOL convertiplanes Dec. 13, 2005
6885917 Enhanced flight control systems and methods for a jet powered tri-mode aircraft Apr. 26, 2005
6873887 Rotor torque anticipator Mar. 29, 2005
6860449 Hybrid flying wing Mar. 1, 2005
6824094 Power assembly for ornicopter Nov. 30, 2004
6789764 Dual-flight mode tandem rotor wing Sep. 14, 2004
6695253 Method and apparatus for folding/unfolding the blades of a rotary-wing aircraft rotor Feb. 24, 2004
6672538 Transmission for a coaxial counter rotating rotor system Jan. 6, 2004
6644588 Multi-mode tiltrotor nacelle control system with integrated envelope protection Nov. 11, 2003

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