73105517
Nov 5, 1976
Feb 21, 1978
TEACHING AND COMMUNICATION APPARATUS FOR NON-VERBAL PERSONS CONSISTING OF A MASTER DISPLAY UNIT CONTAINING A BOARD WITH PICTURES AND OTHER PRINTED INDICIA THEREON, A TRANSPARENT GRID AND MASKING STRIPS TO COVER ALL OR PORTIONS OF THE BOARD AND A HEAD MOUNTED WAND FOR POINTING TO THE PICTURES AND PRINTED INDICIA ON THE BOARD
Paper Goods and Printed Matter