DIFF Subgroup
G03B 21/50 Control devices operated by the film strip during the run
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Projectors or projection-type viewers; Accessories therefor > Details > Details specially adapted for motion-picture projection > Control devices operated by the film strip during the run
CPC:
Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Details > Details specially adapted for motion-picture projection (with film moving continuously through the gate G03B41/02) > Control devices operated by the film strip during the run
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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