The history of color scanners goes back further than many people realize. They were originally developed by companies such as RCA and Kodak in the 1930's and the first commercially acceptable separations were produced in the late 1950's by PDI.
Claude Kersh, Claude Kersh,
"Magnasican 570 Page Composition System", Proc. SPIE 0223, Laser Scanning and Recording for Graphic Arts and Publications, (14 August 1980); doi: 10.1117/12.958664; https://doi.org/10.1117/12.958664