DIFF Subgroup
G02B 27/02 Viewing or reading apparatus (stereoscopic systems G02B30/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Viewing or reading apparatus
CPC: Viewing or reading apparatus (stereoscopic systems G02B30/00)
Full Title
Full titles differ between systems:
IPC:
Optical systems or apparatus not provided for by any of the groups , > Viewing or reading apparatus
CPC:
Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 > Viewing or reading apparatus (stereoscopic systems G02B30/00)
Of 6 combined children, 3 exist in both systems.
3 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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