Rockwell International
Douglas Aircraft Company
Convair
Boeing
McDonnell Aircraft Corporation
Pratt & Whitney
McDonnell Douglas
Northrop Corporation
Lockheed Corporation
Grumman
Boeing Defense, Space & Security
Republic Aviation
Rocketdyne
Pratt & Whitney Rocketdyne
Northrop Grumman
Former aerospace manufacturer in the United States
North American Aviation was a major American aerospace manufacturer that designed and built several notable aircraft and spacecraft. Wikipedia