Inventor: Apps, Darrel A.
Inventor: Heemskerk, Gerardus J. C. M.
Inventor: Heemskerk, Gerardus J. C. M.
Inventor: Heemskerk, Gerardus J. C. M.
Inventor: Heemskerk, Gerardus J. C. M.
Inventor: Heemskerk, Gerardus J. C. M.
Inventor: Apps, Darrel A.
Inventor: Apps, Darrel A.
Inventor: Danziger, Gavriel
Inventor: Heemskerk, Gerardus J. C. M.
Inventor: van Delft, Luite Cornelis Johannes
Inventor: Bauer, deceased, Rudolf, Bauer, heir, by Annelise