(under subclass 76) Subject matter having fluid means as a part thereof.
(1) Note. The fluid means must be significant to the electrical measurement or to the apparatus used in the measurement, and may be used, for example, as an expansible means in a thermal meter, as a lubricant, or as a cooling means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
155, for meter pivots and bearings.
SEE OR SEARCH CLASS
73, Measuring and Testing,
861+, for fluid rate of flow or volume meters, 290+ for fluid depth gages, and 700+ for fluid pressure gages. 137, Fluid Handling, appropriate subclasses, for the subject matter of that class. Note
123+, for syphons, and subclasses 334+ for fluid handling with heating.
