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Chester Carlson, a physicist and former patent analyst from Seattle, developed a method for using electrostatic technology to photocopy printed pages in 1938, according to Invent.org. His photocopier was purchased by the Xerox Corporation in 1947 and introduced to the general public in 1959.
Source:
Invent.org: Chester F. Carlson
Business Week: Xerox History: The Highs and the Lows
Massachusetts Institute of Technology: Chester F. Carlson
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