University of Illinois (Urbana-Champaign campus). Engineering Experiment Station, Albert Ernest Roberts Westman, Andrew Irving Andrews, Fred B. Seely, Hardy Cross, Harold Eaton Babbitt, Herbert Fisher Moore, Joseph Albert Polson, University of Illinois at Urbana-Champaign. Engineering Experiment Station, Harry Edward Schlenz, Richard Vernon James, Seichi Konzo, Tibor Ver · 1930
Albert Ernest Roberts Westman, Cloyde Moffett Smith, Frank Erwin Richart, Fred B. Seely, Harold Eaton Babbitt, Joseph Tykocinski Tykociner, Wilbur M. Wilson, Anton Brandtzæg, Harry Edward Schlenz, Ralph Wilbur Armstrong, Richard Vernon James, Rex Lenoi Brown · 1929