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While building magnetrons at MIT in the 1940s, Percy Spencer noticed a melting chocolate bar in his pocket. Deeper investigation and exploration led to the invention of what household device? Spencer received no royalties for this invention, first marketed as the Radarange.

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1. While building magnetrons at MIT in the 1940s, Percy Spencer noticed a melting chocolate bar in his pocket. Deeper investigation and exploration led to the invention of what household device? Spencer received no royalties for this invention, first marketed as the Radarange.





 
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