Igor Sikorsky
Igor Sikorsky invented the helicopter.
Igor Sikorsky co. did.
Igor Sikorsky
Igor Sikorsky invented the first practical helicopter.
Igor Sikorsky
Igor Sikorsky
igor sikorsky
Igor Sikorsky invented the helicopter.
Igor Sikorsky's birth name is Igor Ivanovich Sikorsky.
Igor Ivanovich Sikorsky in 1925
Igor Sikorsky co. did.
Igor Sikorsky
Igor Sikorsky invented the first practical helicopter.
Igor sikorsky invented the helicopter he also died on october 26, 1972 and born on may 25, 1889
Igor Sikorsky invented the first practical helicopter around 1940
In the 1930's he invented the helicopter