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John C. Sheehan (1915)close

John Sheehan was born in Battle Creek, Michigan. He was an inventor who developed the synthetic form of penicillin in 1957, revolutionizing the field of medicine by vastly expanding the availability of life-saving antibiotics. Sheehan was awarded more than 40 patents including one for the explosive RDX, which replaced TNT in rocket, bomb, and torpedo warheads.

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