(under the class definition) Apparatus including means, such as weighers, samplers, thermometers, overflow indicators, and position indicators, for indicating or testing the operation of the apparatus.
(1) Note. Compare this class, subclass 88, and see the notes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
524+, particularly subclasses 527+, for signals such as lights, bells, etc., combined with automatic controls,
SEE OR SEARCH CLASS
73, Measuring and Testing. 116, Signals and Indicators.
198, Conveyors: Power-Driven,
502.1+,.
340, Communications: Electrical,
500+,.
374, Thermal Measuring and Testing,
141+, for a thermometer combined with a diverse art device.
