Michael J. Martin, 81, of Branchburg died on Friday, October 3 , at the Somerset Medical Center in Somerville. Born in New York, he had been a resident of Fanwood before relocating to Branchburg 13 years ago. Mr. Martin had been a regional sales director with Lockheed Electronics in Lyndhurst, where he was employed for 25 years prior to retiring in 1983. A United States Marine Corps veteran of World War II, he had been awarded the Purple Heart. He was a member of the Marine Raiders and the Knights of Columbus Somerset Council No. 1432 in Somerville. Mr. Martin was an usher at St. Bartholomew the Apostle Roman Catholic Church in Scotch Plains. Surviving are his wife of 56 years, Martha Martin; a son, Michael J. Martin, Jr.; three daughters, Mary Jane Sullivan, Christine Nugent and Linda Martin; a brother, John Martin, and five grandchildren. The funeral service was held on Monday, October 6, at the Branchburg Funeral Home in Branchburg. A Mass followed at St. Bernard Roman Catholic Church in Bridgewater. Entombment took place at St. Gertrude Cemetery Mausoleum in Colonia.