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Twenty-five year old Douglas Perham, at left, with fellow technician C. Albertus, and engineer Peter V. Jensen in 1910. They are seen here with the first complete arc transmitter and receiver built by Poulsen Wireless of Palo Alto (later Federal Telegraph). Jensen left soon after to found the Magnavox [loudspeaker] Co.
Poulsen Wireless Telephone and Telegraph Company Palo Alto (Calif.) Engineers Federal Telegraph Company Employees Albertus, F Jensen, Peter V Perham, Douglas M