Seymour S. Katz

H. A. Maynier

H. A. Maynier worked for the United States Engineer District Office.

T. Higgins

Walter J. Grundhauser

Walter J. Grundhauser was a research assistant the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

J. C. Blackwood

J. C. Blackwood worked for the Fercleve Corporation.