72318353
Feb 5, 1969
Dec 16, 1969
POLYFIBRON TECHNOLOGIES INC.
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CHEMICAL USED FOR ETCHING PRINTING PLATES
PHOTOCOMPOSING APPARATUS FOR PREPARING FLEXIBLE PRINTING PLATES COMPRISING CAMERA UNIT, EXPOSURE UNIT AND PROCESSING UNIT
PRINTING PLATES AND A COATED FILM USED AS A BACKING FOR PRINTING PLATES