United States Patent 3295651
Inventors:
Stefan, Klackowski
Birch, Goalby Barry
Charles, Lowe Dennis
Roy, Salter
Publication Date:
01/03/1967
Assignee:
DE LA RUE THOMAS & CO LTD
Other Classes:
283/57, 235/488, 250/303, 235/491, D11/95, 283/72
International Classes:
G07F1/06; G07F1/00