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Last Checked Oct. 24, 2021

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Wed Oct 06 19:07:04 +0000 2021

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Ajit Pai @AjitPai

OTD in 1942, the @uspto granted Chester Carlson a patent for what we now call photocopying. Years later, Carlson's invention of "xerography" would become the mainstay of @Xerox. https://t.co/ZxtvaGSEGm https://t.co/srb7PcYfnE https://t.co/G7ep02cKWN — PolitiTweet.org

Ajit Pai @AjitPai

OTD in 1938, Chester Carlson and Otto Kornei put a glass slide with writing on it on a zinc plate coated with sulfu… https://t.co/qXxunpDO53

Posted Oct. 6, 2021