IPC Subgroup
G02B 15/02 by changing, adding, or subtracting a part of the objective, e.g. convertible objective
Introduced: September 1968
Last revised: January 2006
Full Title
Optical objectives with means for varying the magnification > by changing, adding, or subtracting a part of the objective, e.g. convertible objective
Classification Context
- Section:
- PHYSICS
- Class:
- OPTICS
- Subclass:
- OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
2 direct subcodes
Child Classifications
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- G02B 15/04 by changing a part
- G02B 15/1 by adding a part, e.g. close-up attachment