Dactylochrome Trademarks

DACTYLOCHROME LEARNING LANTERN
AUDIO-VISUAL TEACHING MACHINES
Expired  ·  July 18, 1966  ·  72250454  · 
DACTYLOCHROME TOUCH-A-COLOR
AUDIO-VISUAL TEACHING MACHINE
Expired  ·  July 18, 1966  ·  72250455  ·