CPC Subgroup
G03C 5/14 combined with sound-recording (sound-recording in general G11B)
Full Title
Photographic processes or agents therefor; Regeneration of such processing agents (multicolour processes or agents therefor G03C7/00; diffusion-transfer processes or agents therefor G03C8/00; stereo-photographic processes G03C9/00; photomechanical processes G03F) > Cinematrographic processes of taking pictures or printing > combined with sound-recording (sound-recording in general G11B)