(under subclass 142) Subject matter comprising means for transmitting a signal within radar frequency bands or sound waves and means for determining speed using a reflected signal or waves.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39, for flaw or defect detection by sound energy.
48, for flow metering by acoustic energy.
54, for fluid measurement by vibration or acoustic sensor.
103, for calibration or correction of an acoustic measuring system.
SEE OR SEARCH CLASS
342, Communications: Directive Radio Wave Systems And Devices (e.g., Radar, Radio Navigation), 104+, for velocity determination.
367, Communications, Electrical: Acoustic Wave Systems and Devices,