Subject matter under the cross-reference collection definition wherein significance is attributed to an identifier*.
SEE OR SEARCH CLASS
235, Registers,
490, for an identifier encoded with material which projects
from the plane of the identifier.
250, Radiant Energy,
555+, for a photocell controlled circuit including a coded identifier; and subclasses 566+ for an optical or pre-photocell system including a coded identifier.
283, Printed Matter, 72+, for a printed article including an enhancement (e.g., a cryptogram, microfilm, etc.) making it suitable for use as an identifier (particularly subclass 75 for a personal identifier, and subclasses 107+ for printed matter having a plastic laminate); and art collections 901 for printed matter with concealed data and 904 for credit cards.
428, Stock Material or Miscellaneous Articles, appropriate subclass for laminated articles, per se.
