ALL IS VEL
Tuesday, 30 July 2013
INVENTION AND INVENTOR
Invention
Inventor
Year
Patent No.
Alternating Current Calculations
Charles Proteus Steinmetz
1897
Alternator
Nikola Tesla
1891
US447,921
Battery (Voltaic Pile)
Alessandro Volta
1800
Cell Phone
Martin Cooper
1973
US3,906,166
Microphone
Emile Berliner
1877
US224,573
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