Inventor: Danziger, Gavriel
Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Danziger, Gavriel
Inventor: Danziger, Gabriel
Inventor: Danziger, Gabriel
Inventor: Heinrich, Westhoff
Inventor: Danziger, Gabriel
Inventor: Danziger, Gabriel
Inventor: Yates, Frederic
Inventor: Van Andel, Otto Jan Robert
Inventor: Westhoff, Heinrich