== History == In 1970 the A.H. Robins Company acquired the Dalkon Shield from the Dalkon Corporation, founded by Hugh J. Davis, M.D. The Dalkon Corporation had only four shareholders: the inventors Davis and Irwin Lerner, their attorney Robert Cohn, and Thad J. Earl, M.D., a medical practitioner in Defiance, Ohio. In 1971, Dalkon Shields went to t...