They designed a movie camera and projector, each with three lenses covered by orange-red, green and blue-violet filters.

Godowsky studied violin at UCLA and became a violinist with the San Francisco Symphony Orchestra.

By 1922, Godowsky had given up his orchestra jobs in California and moved back to New York City where he and Mannes worked as musicians.

While on his way to perform in Europe in late 1922, Mannes made the chance acquaintance of a senior partner in the investment firm of Kuhn, Loeb and Co. and described their progress with color photography.

Some months later the firm sent one of their junior associates, Lewis L. Strauss to the Mannes apartment to view the color process.

With financial backing, Mannes and Godowsky built a dedicated laboratory and in 1924 took out additional patents on their work.

By 1935, Mannes and Godowsky and the Kodak research staff had developed a marketable subtractive color film for home movies.

Leopold Mannes died from a cerebral hemorrhage at Martha's Vineyard Hospital on August 11, 1964, and was buried at Chilmark Cemetery.