Olof P. Pierson, 87, a United Nations consultant and inventor of frozen french fries. He developed the frozen french fry at the H.C. Boxter Co. laboratory in Hartland, Me., in the 1940s. The first frozen fries were sold through the Birds Eye Co. frozen foods plant in Caribou, Me., in 1947. Pierson later designed the first french fry plant for McCain Foods of Florenceville, Canada. As a U.N. consultant, he traveled to Poland, Brazil, Greece, Sweden and Canada to help with potato processing, machinery selection and plant design. In Caribou on Nov. 3.