MICROBOOKS
								ALL KINDS AND SIZES OF MICROPRINTED PUBLICATIONS AND MICROFILMS, FOR USE WITH ENLARGERS, ON WHICH OPAQUE AND TRANSPARENT MEDIA, TEXT, ILLUSTRATIONS, TABLES, GRAPHS, CHARTS, AND THE LIKE ARE PRODUCED IN REDUCED SIZE BY PHOTOGRAPHY, PRINTING, OR OTHER PROCESSES
                                Expired  ·  April 28, 1955  ·  71686470  ·