AUDIENCE SURVEY OR PROGRAM DISTRIBUTION USE ACCOUNTING:
(under the class definition) Subject matter including means
for indicating, metering, or recording the number of receivers using a program, the length of time that a program is being used, or which of several programs is being used.
(1) Note. This subclass is provided for generic devices of this type. Use survey and accounting systems which are designed for a specific type of signal such as television (Class 348) are not classified here but in the class appropriate thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.1+, for program distribution systems.
26, for systems to prevent unauthorized use of a signal.
SEE OR SEARCH CLASS
348, Television, 1+, for use survey and accounting systems specific to television and subclasses 13+ for interactive television which may include an audience survey.
380, Cryptography, appropriate subclasses for a cryptos:graphic system to prevent unauthorized use of a signal.
