Inventor: Brandsma, Christine
Inventor: Willems, Rogier
Inventor: Willems, Rogier
Inventor: Willems, Rogier
Inventor: van der Hoorn, Antonius C. J.
Inventor: George L. Thomas, Jr.
Inventor: George L. Thomas, Jr.
Inventor: Charles Brosius Thomas
Inventor: Charles Brosius Thomas
Inventor: Slocum, Perry D.
Inventor: Randig, Martin E.
Inventor: Pring, George Harry