CPC Subgroup
G03B 21/54 Accessories
Full Title
Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Accessories
2 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- G03B 21/56 Projection screens
- G03B 21/64 Means for mounting individual pictures to be projected, e.g. frame for transparency