IPC Subgroup
G03B 21/56 Projection screens
Introduced: September 1968
Last revised: January 2006
Full Title
Projectors or projection-type viewers; Accessories therefor > Accessories > Projection screens
Classification Context
- Section:
- PHYSICS
- Class:
- PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- Subclass:
- APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
Related Keywords
SCREEN(S) for photographic projection
2 direct subcodes
Child Classifications
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- G03B 21/58 collapsible, e.g. foldable; of variable area
- G03B 21/6 characterised by the nature of the surface