.~.~> Acoustic or vibratory (e.g., sonic, fluidic, etc.)
DEFINITION
Classification: 340/856.3
Including particular sensor:
(under subclass 853.1) Subject matter having a particularly described feature of an underground condition-responsive sensor which provides information signals.
(1) Note. A named or nominal inclusion of a sensor is not considered particularly described as required for classification in this or its indented subclasses.
SEE OR SEARCH CLASS
73, Measuring and Testing,
152.01+, for borehole or drilling testing, per se, not involving a purely electrical test or a purely magnetic test, and subclass 866.5 for a measuring probe, per se, not specifically provided for elsewhere.
