 IBM and its predecessor companies made clocks and other time recording products for 70 years, culminating in the 1958 sale of the IBM Time Equipment Division to Simplex Time Recorder Company, IBM manufactured and sold such equipment as dial recorders, job recorders, recording door locks, time stamps and traffic recorders.The company also expanded its product line through innovative engineering.Behind a core group of inventors – James W. Bryce, Clair Lake, Fred Carroll, and Royden Pierce – IBM produced a series of significant product innovations.