phototelegraph การใช้

• In 1880, English inventor Shelford Bidwell constructed the " scanning phototelegraph " that was the first telefax machine to scan any two-dimensional original, not requiring manual plotting or drawing.
• In 1881, English inventor Shelford Bidwell constructed the " scanning phototelegraph " that was the first telefax machine to scan any two-dimensional original, not requiring manual plotting or drawing.