What George Westinghouse invented?
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When were bar code scanners invented?
What charge card, developed in 1950, was the first to be approved nationally in the US?
The card was established by Frank McNamara and Ralph Schneider.
Who invented Gramophone?
Stethoscope was invented by
In which year was the first solid state integrated circuit demonstrated?
Who Invented Modern Frequency Modulation FM Radio ?
Who Invented Microwave Oven ?
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