Helicopter

Details Helicopter Helicopter

1980-10-14

1983-08-16

Douglas, Alan P.

Transportation

Aircraft, spacecraft, or fuselage

Vertical takeoff type

D1207

Patent

active

D02701510

REFERENCES:
patent: D232168 (1974-07-01), Leoni
patent: D239710 (1976-04-01), Garrison
patent: D239930 (1976-05-01), Ulisnik
Flight International, Oct. 30, 1975, p. 661, Sikorsky-S76 Helicopter at bottom left of page.
Flight International, Jul. 17, 1975, p. 92, Sikorsky YUH-60 A Helicopter at top of page.

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