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Class Information
Number: 244/17.23
Name: Aeronautics > Aircraft, heavier-than-air > Helicopter or auto-rotating wing sustained, i.e., gyroplanes > Having plural lifting rotors
Description: Gyroplanes which are provided with a plurality of rotating wings.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8702466 Model helicopter Apr. 22, 2014
8690096 Aircraft with dual flight regimes Apr. 8, 2014
8661781 Counter rotating fan design and variable blade row spacing optimization for low environmental impact Mar. 4, 2014
8646720 Modular flight vehicle with wings Feb. 11, 2014
8640985 Co-rotating stacked rotor disks for improved hover performance Feb. 4, 2014
8640983 Rotor hub and controls for multi-bladed rotor system Feb. 4, 2014
8636473 Differential pitch control to optimize co-rotating stacked rotor performance Jan. 28, 2014
8615980 Gas turbine engine with noise attenuating variable area fan nozzle Dec. 31, 2013
8619115 Video communication system and method for using same Dec. 31, 2013
8602349 Airborne, tethered, remotely stabilized surveillance platform Dec. 10, 2013
8590828 Rotocraft Nov. 26, 2013
8584983 Magnetic de-rotation system for a shaft fairing system Nov. 19, 2013
8579228 Twin rotor flying vehicle Nov. 12, 2013
8565941 Method for compensation of gyroscopic forces of a rotor in a helicopter Oct. 22, 2013
8556207 Helicopter with counter-rotating coaxial rotors without cyclic variation of pitch, equipped with means for aerodynamic control of attitude and flight path Oct. 15, 2013
8534596 Planetary de-rotation system for a shaft fairing system Sep. 17, 2013
8528854 Self-righting frame and aeronautical vehicle Sep. 10, 2013
8523627 Model helicopter with improved reduction gear mechanism Sep. 3, 2013
8509968 System and method for real-time aircraft efficiency analysis and compilation Aug. 13, 2013
8500062 Rotor blade spacing for vibration attenuation Aug. 6, 2013
8485464 Personal aircraft Jul. 16, 2013
8469307 Rotary wing vehicle Jun. 25, 2013
8464978 Counter-rotational inertial control of rotorcraft Jun. 18, 2013
8453962 Modular flying vehicle Jun. 4, 2013
8444081 High voltage flying apparatus employing multiple motors May. 21, 2013
8434710 Aircraft May. 7, 2013
8418959 Unmanned aerial vehicle having spherical loading portion and unmanned ground vehicle therefor Apr. 16, 2013
8413932 Peripheral control ejector Apr. 9, 2013
8393564 Personal aircraft Mar. 12, 2013
8393866 Drive device for driving first and second lift rotors of a rotorcraft having twin rotors in tandem Mar. 12, 2013
8376264 Rotor for a dual mode aircraft Feb. 19, 2013
8356768 Multiple drive-path transmission with torque-splitting differential mechanism Jan. 22, 2013
8342440 Miniature robotic vehicle with ground and flight capability Jan. 1, 2013
8342441 VTOL vehicle with coaxially tilted or tiltable rotors Jan. 1, 2013
8328128 Aircraft Dec. 11, 2012
8328130 Vertical take off and landing unmanned aerial vehicle airframe structure Dec. 11, 2012
8322648 Hovering aerial vehicle with removable rotor arm assemblies Dec. 4, 2012
8308522 Flying toy Nov. 13, 2012
8292215 Helicopter with folding rotor arms Oct. 23, 2012
8282035 Mechanical device for combining first and second control orders, and an aircraft provided with such a device Oct. 9, 2012
8276840 Fail-operational multiple lifting-rotor aircraft Oct. 2, 2012
8210469 Hybrid device for vibration control Jul. 3, 2012
8172173 Covert sensor emplacement using autorotational delivery mechanism May. 8, 2012
8167234 Insect-like micro air vehicle having perching, energy scavenging, crawling, and offensive payload capabilities May. 1, 2012
8157203 Methods and apparatus for transforming unmanned aerial vehicle Apr. 17, 2012
8146854 Dual rotor vertical takeoff and landing rotorcraft Apr. 3, 2012
8141812 Multiple drive-path transmission with torque-splitting differential mechanism Mar. 27, 2012
8128034 Rotorcraft with opposing roll mast moments, and related methods Mar. 6, 2012
8123176 Velocity feedback control system for a rotor of a toy helicopter Feb. 28, 2012
8096497 Power assembly and a coaxial twin propeller model helicopter using the same Jan. 17, 2012

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