The 3-strip Technicolor camera was a marvel of engineering, developed by J.A. Ball and his team of engineers and color scientists. The camera was introduced in the early 1930s and was the mainstay of 35mm color motion picture photography until 1954 and the production of Foxfire, when it was phased-out.
Around that time, Technicolor color scientists invented Technicolor process number 5 which allowed the company to extend the life of IB dye-transfer motion picture printing until the late 1970s.
The short video presentation was produced by the George Eastman House and gives more background.