DIFF Subgroup
G03B 21/02 Multiple-film apparatus
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Projectors or projection-type viewers; Accessories therefor > Multiple-film apparatus
CPC:
Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Multiple-film apparatus
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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