Inventor: des Brisay, Junius
Inventor: Shibata, Masaru
Inventor: Hollingsworth, Donald
Inventor: Libby, William J., Tufuor, Kwabena
Inventor: Rudolph, Nathan H.
Inventor: Carl George Klehm
Inventor: Carl George Klehm
Inventor: Carl George Klehm
Inventor: Carl George Klehm
Inventor: Carl George Klehm