VAPOTRON
ELECTRONIC AND ELECTRICAL AND REMOTE CONTROL INSTRUMENTS AND APPARATUS-NAMELY, RADIO RECEIVING AND BROADCASTING INSTRUMENTS, TELEGRAPH INSTRUMENTS, TELEPHONE AND TELEVISION RECEIVING AND BROADCASTING INSTRUMENTS, ELECTRIC WIRES AND CABLES, CATHODE RAY TUBES, ELECTRONIC TUBES, VACUUM OR GAS-FILLED TUBES AND TRANSMITTING TUBES COOLED BY VAPORIZATION
Expired · August 25, 1972 · 72433807 ·
