United States Patent 3521280
Inventors:
Janco, Maurice
Nordsieck, Arnold T.
Perkins, Charles W.
Publication Date:
07/21/1970
Other Classes:
342/51, 235/439
International Classes:
B07C3/12; B65G47/49; G06K7/10; G06K19/067; B07C3/10; B65G47/48; G01S9/56