Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Kardos, Joshua H., Dirr, Michael A.
Inventor: Torn, Douglas I.
Inventor: Dickerson, David
Inventor: Koot, Johannes Adrianus Maria
Inventor: Lee, Robert Edward
Inventor: Dirr, Michael A.
Inventor: Van Andel, Otto Jan Robert
Inventor: Barendse, Nicolaas Wilhelmus Jozef Maria
Inventor: Van Andel, Otto Jan Robert