McDonnell Douglas paid $470 million for the company and made it a subsidiary with the name McDonnell Douglas Helicopter Systems in August 1984 .
In January 1984 , Hughes Helicopters , Inc. was sold to McDonnell Douglas by Summa Corporation .
McDonnell Douglas paid $470 million for the company and made McDonnell Douglas a subsidiary with the name McDonnell Douglas Helicopter Systems in August 1984 .
In January 1984 , Hughes Helicopters , Inc. was sold to McDonnell Douglas by Summa Corporation .