Founded in 1945 by Glidden J. Doman at Danbury, New York, to construct rotorcraft with hingeless rotorblades and totally enclosed self-lubricating hub. Produced LZ-1 a, LZ- 2a Pelican, LZ-4, LZ-5 ,and a developed version, DB-1 OB, in 1953. At one time known as Doman-Frasier Helicopters Inc. Doman H-31 of 1952 was license-built by Hiller Aircraft Company Inc. Operations transferred to Puerto Rico, with continued production of DB-10B and name changed in 1967 to Berlin-Doman Helicopters, recognizing interests of Chairman Dr. Don R. Berlin.

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