(under the class definition) Products chemically defined which functions to modify the radiation during imaging and is in the form of a photomask, screen, etc., or the process of making same or like products.
SEE OR SEARCH THIS CLASS, SUBCLASS:
510+, for antihalation or filter layer containing product.
SEE OR SEARCH CLASS
360, Dynamic Magnetic Information Storage or Retrieval,
131+, for record medium, especially subclass 134 for tape; subclass 135 for disk; and subclass 136 for drum.