(under subclass 36) Subject matter wherein the resistor actuator is a diaphragm, or a flexible or deformable wall or casing structure.
SEE OR SEARCH CLASS
73, Measuring and Testing,
262+, for volume or rate of flow meters with a diaphragm or
collapsible wall; subclasses 278 and 279+ for diaphragm mountings and diaphragms for such meters; and subclasses 719 and 725 for fluid pressure gauges including a diaphragm.