50 TAPES FOR USE BY ARTISTS, DRAFTSMEN AND THE LIKE, AND INSTRUMENTS FOR APPLYING THE SAME; CHARACTERS, SYMBOLS, SIGNS, CONFIGURATIONS, SHADINGS, AND SIMILAR ELEMENTS PRINTED IN SETS ON A CARRIER SHEET; COLOR SHEETS FOR USE IN THE GRAPHIC ARTS; AND SINGLE SHEETS AND PADS OF SHEETS RECEIVING PEN, PENCIL OR ARTISTS COLOR