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DIFF Subgroup
G02B 23/26

using light guides

Introduced: January 1985

Full Title

Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices > Instruments for viewing the inside of hollow bodies, e.g. fibrescopes > using light guides

No child classifications to compare. This is a leaf node in both IPC and CPC.