(under subclass 170.29) Subject matter wherein the physical parameter or phenomenon is a moving ridge or swell on the surface of the naturally occurring body of water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
148, for a model basin or testing tank, per se.
290+, for liquid level measuring, per se.
861+, for fluid flow rate measuring with direction determination.
SEE OR SEARCH CLASS
116, Signals and Indicators, 67+, for mechanical alarms providing a humanly perceptible signal in response to a predetermined oceanological condition; particularly, subclass 107 for a signalling device being placed upon a buoy wherein the signal is produced by a wave or current.
338, Electrical Resistors,
4, for a liquid actuated resistor, per se, and subclasses 35+ for a liquid responsive resistor, per se.
361, Electricity: Electrical Systems and Devices,
284, for a liquid level responsive capacitor, per se, and subclass 285 for a fluid flow responsive capacitor, per se.
