Which individual held the patent for the theoretical concept of the four-stroke cycle dating back to 1862?

Answer

Alphonse Beau de Rochas

Frenchman Alphonse Beau de Rochas held the prior patent from 1862 for the theory of the four-stroke cycle, although he never built a functional engine.

Which individual held the patent for the theoretical concept of the four-stroke cycle dating back to 1862?

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