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When were solar powered calculators invented, and by who?

by Guest32709  |  earlier

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  1. 1978

    by Teal Industries Inc., (Tokyo Electronic Application Laboratory Ltd.)

    also Royal Typewriter Company

    also Sharp  

    The first solar powered calculators were introduced, the Royal Solar 1, Teal Photon Teal Photon , and Sharp EL-8028.

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