Class Information
Number: 250/329
Name: Radiant energy > Record projectors
Description: Subject matter which includes a source of radiation, a screen and a record having a pattern or a support for a record wherein the radiation forms a radiation image of the pattern and (1) a light image of the radiation image is formed on the screen or (2) a light reversal image is formed on the screen, when illuminated and methods of using such means.
Patents under this class:
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