IPC Subgroup
G02B 27/02 Viewing or reading apparatus
Introduced: September 1968
Last revised: January 2006
Full Title
Optical systems or apparatus not provided for by any of the groups , > Viewing or reading apparatus
Classification Context
- Section:
- PHYSICS
- Class:
- OPTICS
- Subclass:
- OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
Scope Notes
Limiting references: Stereoscopic systems | Application references: of the projection type Slide-changing apparatus
3 direct subcodes
Child Classifications
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- G02B 27/04 having collapsible parts
- G02B 27/06 with moving-picture effect
- G02B 27/08 Kaleidoscopes