TRIPHONE
TELEPHONIC APPARATUS AND APPLIANCES, COMPRISING EXTERNAL AND INTER-OF-FICE TELEPHONES, LOUD-SPEAKING TELEPHONES, AMPLOFIERS, RECTIFIERS, LOUDSPEAKERS, RELAYS, SELECTORS AND SIGNAL AND CALL-LAMPS AND PARTS FOR ALL THE AFOREMENTIONED GOODS
Expired · February 2, 1971 · 72382710 ·
