Inventor: Burton, Stephen
Inventor: van der Velden, Josephus M.
Inventor: Niekerk, Johan Van
Inventor: Burton, Stephen
Inventor: Burton, Stephen
Inventor: Burton, Stephen
Inventor: van Niekerk, Johan
Inventor: van Niekerk, Johan
Inventor: Houser, John E.
Inventor: Schoenmakers, Kees
Inventor: Cornelis, Daniel
Inventor: Hutchins, Graham
Inventor: Tooby, Hubert J.
Inventor: Gavello, Louis E.
Inventor: Bradford, Virginia