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inventors and inventions (Benjamin Franklin (bifocals, swim fins,…
inventors and inventions
thomas Edison
light bulb
electricty
telegraphy
motion camera
Benjamin Franklin
bifocals
swim fins
lightning rod
armonica
urinary catheter
leonardo da vinci
parachute
giant crossbar
hellicopter
clock
Alexdander bell
hydrofoil boat
wheat husker
metal detector
telephone
Henry ford
auto soundproffng
cooling fans
improved pipe cleaners
Mary Anderson
windscreen wiper
Albert Einstein
E=mc2
general theory of reality
theory of light
James watt
watt steam engine
horse power
photocopier