Raymond Waibel Ketchledge (December 8, 1919 – October 23, 1987)[1][2] was an American engineer, known for his contributions to the first computerized telephone switching control systems.
Born in Harrisburg, Pennsylvania,[3] Ketchledge married Lois Jane Quackenbush.
(1942) in electrical engineering from the Massachusetts Institute of Technology before joining Bell Labs where he stayed for his whole professional career (1942–1982).
This brought him fame due to the pioneering work on applying stored program architecture to telephone switching systems.
He held sixty patents in diverse areas, including thirty-one in switching systems.