- Martin Joseph Gavin, Richard Valentine Ageton, Willard Walker Cutler, Arno Carl Fieldner, Arthur L. Murray, Byron O. Pickard, C. Lorimer Colburn, C. R. Forbes, Charles Edward Munroe, Daniel Harrington, Donald B. Dow, Ernest Woodward Dean, Eugene Delos Gardner, F. J. Bailey, G. St. John Perrott, George Arthur Burrell, George Edward McElroy, Guy B. Taylor, H. F. O'Brien, J. J. Bourquin, John Gross, Joseph Dana Davis, Lee Clyde Ilsley, N. A. C. Smith, Oliver Bowles, R. M. Winslow, Raymond Bardeen Ladoo, Roy R. Hornor, Royd Ray Sayers, Royden Edward Head, Samuel Wilson Parr, Thomas Fraser, United States. Bureau of Mines, William Hawes Coghill, William Wallace Odell, A. D. Bauer, C. E. Coleman, Carl O. Anderson, George William Jones, H. H. Hill, Harry Fagan Yancey, Henry Rust O'Brien, Horace Chamberlain Porter, J. W. Paul, John T. Aydelotte, Lewis C. Karrick, Maurice Bacon Cooke, Palmer B. Place, Selwyne Perez Kinney, Sidney Hershberg Katz, Thomas Ernest Layng, Walker Stillwell Clute, C. R. Bopp, E. C. White, George Stanley Scott, W. B. Lerch, W. E. Perdew
· 1921
- Edmund Spriggs Leaver, Ralph H. Espach, Richard Duddleston Leitch, William Hawes Coghill, Arthur William Fahrenwald, C. Travis Anderson, Chase Elverton Sutton, Clifford Cook Furnas, Curt Nicolaus Schuette, Daniel Harrington, E.C. Lane, Edward H. Denny, Edwin Lee Rawlins, Eugene Delos Gardner, F. E. Cash, G. B. Shea, G. R. Hopkins, G. St. J. Perrott, George Edward McElroy, George Samuel Rice, H. M. Lawrence, Harold P. Rue, Harold Putnam Greenwald, Henry Alfred Doerner, J. D. Davis, John Gross, John Michael Devine, John Roy Thoenen, R. G. O'Meara, Ronald Van Auken Mills, Royd Ray Sayers, Royden Edward Head, Rudolph Richard Brandenthaler, Scott Turner, Thomas Leonard Joseph, Thomas Varley, William A. Sloan, William Waugh Adams, Jesse Arthur Woolf, Clarence Watson Owings, D. J. Parker, F. D. De Vaney, F. W. Lane, J. J. Forbes, K. L. Marshall, O. W. Greeman, S. R. Zimmerley, T. W. Johnson, Virgil Miller, Arno Carl Fieldner, F. Feehan
· 1928
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