1939
- George W. Bailey
- Walter E. Baranowski
- Edgar H. Batcheller
- Allan M. Chambliss
- Charles H. Gerlach
- Edward R. Tilburne
- George C. Wells
- E. A. Wright
1938
- James S. Bethea
- Charles A. Curtze
- Robert E. Garrels
- Robert B. Madden
- Henry P. Rumble
1937
- Robert L. Evans
- Joseph E. Flynn
- Richard S. Mandelkorn
- William A. Miller
- Charles J. Palmer
- Paul W. Pfingstag
- Floyd B. Schultz
1936
- Richard K. Anderson
- Ernest C. Holtzworth
- Ransom A. Pierce
- Albert K. Romberg
- Alexander C. Veasey
1935
- Stanley M. Alexander
- Oscar M. Browne, Jr.
- Marvin H. Gluntz
- Robert E. Perkins
- Leslie E. Richardson
- Robert T. Sutherland, Jr.
- Philip F. Wakeman
1934
- William C. Allen
- Victor B. Cole
- John H. Ellison
- James M. Farrin, Jr.
- Herbert J. Hiemenz
- William H. Leahy
- Mario G. Vangeli
- Herbert C. Zitzewitz
1933
- Raymond 0. Burzynski
- W. E. Howard, Jr.
- Ralph K. James
- Henry T. Koonce
- Alexander Sledge
- John Smyth
- Charles M. Tooke
- Charles A. Watts
- John Zabilsky
1932
- Allan L Dunning
- Robert A. Hinners
- Leroy V. Honsinger
- Herbert J. Pfingstag
- Philip W. Snyder
- William Sprenger
1931
- Felix Aniel-Ouiroga
- Francis X. Forest
- Antonio J. Galvache
- James H. Rodgers
- Oscar Stiegler
1930
- Schuyler N. Pyne