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Class Information
Number: 244/17.15
Name: Aeronautics > Aircraft, heavier-than-air > Helicopter or auto-rotating wing sustained, i.e., gyroplanes > With safety lowering device
Description: Gyroplanes having means other than the rotor to allow lowering of the aircraft or in which the rotor is adjustable to allow the aircraft to be safely lowered.

Patents under this class:

Patent Number Title Of Patent Date Issued
8074919 Parachute support and stabilization for helicopter recovery systems Dec. 13, 2011
8041471 Vertical take-off and landing aircraft and vertical take-off and landing aircraft control method Oct. 18, 2011
RE42446 Emergency anti-torque thruster system Jun. 14, 2011
7559506 Integral powered wing aircraft Jul. 14, 2009
7546976 Dual power helicopter without a tail rotor Jun. 16, 2009
7032860 Emergency anti-torque thruster system Apr. 25, 2006
6390413 Years two thousand of new safety helicopter May. 21, 2002
6382558 Safety system for a helicopter May. 7, 2002
6373521 Aircraft incident surveillance system Apr. 16, 2002
6371410 Emergency landing impact absorbing system for aircraft Apr. 16, 2002
6199799 Parachute device for helicopters Mar. 13, 2001
4913377 Devices which may be borne in air and on devices applicable therein Apr. 3, 1990
4709881 Safety lowering or descent parachute system for disabled helicopters and other similar types of hovering aircraft Dec. 1, 1987
4676457 Aircraft emergency landing system Jun. 30, 1987
4004759 Vertically-flying aircraft Jan. 25, 1977

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