CBS-Hytron
1950s - 1961
Lloyd and Bruce Coffin founded Hytron Radio and Electronics Co. in 1921, making radio vacuum tubes. The firm shifted focus to television tubes after World War II and became part of the CBS empire in 1951. They began making color TV tubes and competed with RCA until they closed the company in 1961. They had plants in Danvers, Newburyport, Salem, and Lowell, Mass.