Charles Rosen, 85, Engineer and Winemaker

Charles A. Rosen, an engineer who was an early researcher in robotic and artificial intelligence and a founder of Ridge Vineyards in Cupertino, Calif., died on Dec. 8 at his home in Atherton, Calif. Born in Montreal, Mr. Rosen came to the United States as a teenager. He studied electrical engineering at Cooper Union in New York City and earned a Ph.D. at Syracuse University. During World War II, he returned to Canada to work on Royal Canadian Air Force aircraft being sent to Britain. After the war, he worked on transistor theory at General Electric Research Laboratories in Schenectady, N.Y., and was the coauthor of an early book on the subject.