The original USA theremin patent was issued February 28, 1928, exactly 80 years ago today.
Related: Original Theremin Patent Filed, Happy Birthday Léon, Theremin Patents, Theremin Patent
Big 80 for Theremin Patent
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The original USA theremin patent was issued February 28, 1928, exactly 80 years ago today.
Related: Original Theremin Patent Filed, Happy Birthday Léon, Theremin Patents, Theremin Patent