Martin Marietta
Lockheed Corporation
Douglas Aircraft Company
Lockheed Martin
North American Aviation
Boeing
Convair
McDonnell Douglas
McDonnell Aircraft Corporation
Northrop Corporation
Bell Aircraft
Boeing Defense, Space & Security
Pratt & Whitney
Grumman
Defunct aerospace manufacturer
The Glenn L. Martin Company, also known as The Martin Company from 1917 to 1961, was an American aircraft and aerospace manufacturing company founded by aviation pioneer Glenn L. Martin. Wikipedia