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Philipp Reis tweets

Thony Christie

RT @yovisto Did you know that German teacher & inventor Johann Philipp Reis already presented his 'Telephone' in 1861? http://t.co/PiKho4r9

http://twitter.com/rmathematicus

11 years ago

yovisto.com

Did you know that German teacher and inventor Johann Philipp Reis presented his 'Telephone' already in 1861? http://t.co/e8Qof32C #DYK

http://twitter.com/yovisto

11 years ago