26 ELECTRIC TEACHING DEVICE CONSISTING OF A DEVICE FOR RECEIVING SELECTED SHEETS OF MULTIPLE CHOICE LETTERS OR SYMBOLS AND ELECTRICALLY RESPONSIVE TO CORRECT SELECTIVE FINGER OPERATION
Trademark Events
Jul 12, 1993
Expired Sec. 9
Jan 30, 1979
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.