DIFF Subgroup
G02B 27/28 for polarising (used in stereoscopes G02B30/25)
Introduced: September 1968
Title
Titles differ between systems:
IPC: for polarising
CPC: for polarising (used in stereoscopes G02B30/25)
Full Title
Full titles differ between systems:
IPC:
Optical systems or apparatus not provided for by any of the groups , > for polarising
CPC:
Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 > for polarising (used in stereoscopes G02B30/25)
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Child Classifications
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