Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Membrey, Stephen
Inventor: Nouws, Joannis Jacobus Petrus
Inventor: Hollingsworth, Donald
Inventor: Rudolph, Nathan H.
Inventor: Carl George Klehm
Inventor: Carl George Klehm
Inventor: Carl George Klehm
Inventor: Carl George Klehm
Inventor: Carl George Klehm