(under the class definition) Subject matter for determining voltage, phase, current, power, frequency or a related quantity in a specific environment.
(1) Note. This subclass includes, for example, voltmeters, per se, in combination with a specific lightning rod.
SEE OR SEARCH THIS CLASS, SUBCLASS:
76+, for a measurement of electricity, per se, when not related to a specific environment. Note particularly subclass 157 for the measurement of electricity combined with some other feature. See (3) Note to the definition of subclass 76 for a statement of the line between subclasses 72 and 76.
