- Sebastian J. Aresco, Cecil Q. Cupps, Francis R. McDonald, Francis X. Tartaron, Frederick W. Hoertel, George S. Koch, Henry G. Iverson, J. M. Stuve, Jack Smith, John S. Berber, Leo A. Schrider, Murray Weintraub, Paul G. Barnard, R. J. Heemstra, Robert W. Van Dolah, Russell E. Griffin, Thomas E. Hill, Van E. Shaw, William P. Haynes, John D. Ruschak, Arthur Alonzo Orning, Eben L. Singleton, Frank C. Gibson, Glenn L. Cook, H. B. Neilson, James G. Donaldson, John B. Janus, Joseph Fry, Richard F. Link, Roald Edmund Lindstrom, Robert Lawrence Marovelli, Robert T. Johansen, Willis A. Calhoun, J. N. Murphy, Cecil H. Schwartz, Harry R. Johnson
· 1967
- Donald Samuel Kingery, James W. Miller, Theodore R. Jolley, H. N. Dunning, John Nagy, Max Richard Geer, Vernon Frank Parry, Wilbur A. Haley, Wilbur I. Duvall, David E. Wolfson, George W. Birge, United States. Bureau of Mines, John W. Moore, Thomas Calvin Atchison, D. D. Dornenburg, James J. Dowd, Robert T. Johansen, Donald W. Mitchell, Bruce W. Naugle
· 1957