When was the voting machine invented?
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Who invented ECG?
Who invented Radio?
Guglielmo Marconi, an Italian invetor invented Radio in 1890's.
Who invented FM radio?
What did Sir William Herschel discover in 1800?
Sir William Herschel discovered Infra-red radiation in 1800.
Magic Marker was invented by _______.
Who Invented Internet Protocol?
Who Invented postage stamp?