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 the vacuum pump?
Who invented bluetooth?
Who discovered the colour photography?
Who invented the electrocardiogram (ECG)?
Who discovered Sodium?
Who invented the waterproof raincoat?
Who discovered Penicillin?
Who discovered electricity and invented the lightning rod and bifocals?
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