DIFF Subgroup
G02B 17/02 Catoptric systems, e.g. image erecting and reversing system
Introduced: September 1968
Full Title
Systems with reflecting surfaces, with or without refracting elements > Catoptric systems, e.g. image erecting and reversing system
Of 4 combined children, 2 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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