71611550
Mar 19, 1951
Mar 23, 1954
LAMPS EMITTING ULTRAVIOLET LIGHT DIRECTED TOWARD ANY OBJECT DISPOSED IN THE BEAM OF THE LAMP FOR USE IN DETECTING FORGED AND COUNTERFEIT STAMPS, CHECKS, TICKETS, DOCUMENTS, AND SIGNATURES, AND FOR BRINGING OUT MARKINGS OR CHARACTERISTICS INVISIBLE UNDER ORDINARY LIGHT
Housewares and Glass