DIFF Subgroup
G03B 21/16 Cooling; Preventing overheating
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Projectors or projection-type viewers; Accessories therefor > Details > Cooling; Preventing overheating
CPC:
Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Details > Cooling; Preventing overheating
No child classifications to compare. This is a leaf node in both IPC and CPC.