EDIPHONE
SOUND RECORDING AND REPRODUCING APPARATUS AND EQUIPMENT CONSISTING OF DICTATING AND TRANSCRIBING MACHINES ESPECIALLY DESIGNED FOR RECORDING AND REPRODUCING DICTATION AND THE LIKE, RECORDING AND REPRODUCING SOUND BOXES, CORRECTION SLIPS FOR USE ON SAID MACHINES, SOUND RECORD TABLETS, AND RACKS AND FILING DEVICES FOR SAID TABLETS
Expired · September 12, 1931 · 71318979 ·