(under subclass 9) Subject matter which encrypts a signal indicating proper authorization of an individual or validity of a record for operating a device.
(1) Note. The subject matter of the classifications referred to in the following search notes are classified in
this class (380) if encryption or encrypting equipment is included therein.
SEE OR SEARCH CLASS
235, Registers,
375+, for a coded record operated system, absent signal encryption.
340, Communications: Electrical,
825.31+, for electrical selective authorization control; subclass 825.34 for selective electrical authentication. 379, Telephonic Communications,
91.01+, for credit authorization, other than verbal, by telephone; subclasses 102.01+ for remote control by telephone.
399, Electrophotography,
12, for unit or part identification, subclass 84 for key sheet controlling job mode, and subclasses 366+ for document handling of unauthorized copy prevention..
