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