Lockheed Martin
Glenn L. Martin Company
Lockheed Corporation
General Dynamics
Martin Marietta Materials
Northrop Grumman
Raytheon
Hughes Aircraft Company
Convair
Northrop Corporation
McDonnell Douglas
Rockwell International
Boeing
American manufacturing company
The Martin Marietta Corporation was an American company founded in 1961 through the merger of Glenn L. Martin Company and American-Marietta Corporation. In 1995, it merged with Lockheed Corporation to form Lockheed Martin. Wikipedia