In what year were color photos invented?
It is not clear who invented the first, but several companies
made color cameras. The earliest seems to be the 1899 Ives Kromskop
Triple Camera by F.E. Ives of Philadelphia, who also made a direct
color viewer for the plates.
Another early 20th century example was the German Jos-Pe in
1925.
Others were made by Devin Colorgraph Company (1939) and Curtis
Laboratories in California (1948).
The color camera was a camera designed for making 3-color
separation negatives on black and white film. It used three sheets
of film for each exposure, each exposed through a different color
filter: red, green, or blue. The filters and plate holders were
placed separately, and the light path divided by prisms or pellical
mirrors.