Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 136,336 pages of information and 219,114 images on early companies, their products and the people who designed and built them.

Martin Marietta Corporation

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1961 The Glenn L. Martin Co, aircraft manufacturer and defence contractor, merged with the American-Marietta Corporation, a large sand and gravel company, to form the Martin Marietta Corporation.

1995 Merged with Lockheed Corporation forming Lockheed Martin

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