United States Patent 3454956
Inventors:
Icenbice Jr., Phineas J.
Rooklyn, Janck
Publication Date:
07/08/1969
Other Classes:
400/521, 400/157.200, 346/141, 234/108, 101/93.040, 400/364, 400/124.200, 335/229
International Classes:
G06K1/12; G06K1/00; B41J9/38; H01F7/08; G01D15/20