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John C. Sheehan

Born: 1915
Birthplace: Battle Creek, Mich.

Semi-synthetic penicillin—For almost 30 years after Sir Alexander Fleming's discovery of penicillin, the process for harvesting the drug took months to generate a small amount. Sheehan succeeded in a general total synthesis of the antibiotic. (1995)

Died: 1992

Claude Shannon

The National Inventors Hall of Fame

Patsy O. Sherman

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