Inventor
YAMAKAWA EIICHI
JP18 patents
Patents
18 patentsUS6312358B1Nov 6, 2001
Constant speed drive apparatus for aircraft generator and traction speed change apparatus
INST ADV TECH HELICOPTER LTD150 citations97
US6499690B1Dec 31, 2002
Rotor blade flap drive apparatus
INST ADV TECH HELICOPTER LTD78 citations94
US6198991B1Mar 6, 2001
Low-noise level landing apparatus and system for helicopters
INST ADV TECH HELICOPTER LTD64 citations94
US6053452AApr 25, 2000
Compensation apparatus for main rotor torque
INST ADV TECH HELICOPTER LTD67 citations94
US5639215AJun 17, 1997
Helicopter rotor equipped with flaps
INST ADV TECH HELICOPTER LTD73 citations94
US6231308B1May 15, 2001
Rotor blade for rotary wing aircraft
INST ADV TECH HELICOPTER LTD57 citations93
US6254504B1Jul 3, 2001
Power transmission apparatus for helicopter
INST ADV TECH HELICOPTER LTD33 citations92
US6454207B1Sep 24, 2002
Flap support mechanism and a flap-equipped rotor blade
INST ADV TECH HELICOPTER LTD29 citations91
US6273681B1Aug 14, 2001
Rotor blade flap driving apparatus
INST ADV TECH HELICOPTER LTD39 citations90
US5782433AJul 21, 1998
Engine deceleration device and power transmission device for helicopters
INST ADV TECH HELICOPTER LTD52 citations90
US6190132B1Feb 20, 2001
Rotor blade for rotorcraft
INST ADV TECH HELICOPTER LTD35 citations89
US5655878AAug 12, 1997
Higher harmonic control apparatus for a helicopter rotor
INST ADV TECH HELICOPTER LTD37 citations89
US6109870AAug 29, 2000
Rotor blade flap driving apparatus
INST ADV TECH HELICOPTER LTD26 citations88
US6272404B1Aug 7, 2001
Flight path indicated apparatus
INST ADV TECH HELICOPTER LTD25 citations86
US6315522B1Nov 13, 2001
Helicopter blade aerofoil and helicopter blade
INST ADV TECH HELICOPTER LTD18 citations75
US6164918ADec 26, 2000
Helicopter blade aerofoil
INST ADV TECH HELICOPTER LTD8 citations73
US5961290AOct 5, 1999
Helicopter blade aerofoil
INST ADV TECH HELICOPTER LTD14 citations73
US5957662ASep 28, 1999
helicopter blade aerofoil
INST ADV TECH HELICOPTER LTD15 citations73