US PATENT SUBCLASS 340 / 856.4-- .~.~ Acoustic or vibratory (e.g., sonic, fluidic, etc.)

US PATENT SUBCLASS 340 / 856.4
.~.~ Acoustic or vibratory (e.g., sonic, fluidic, etc.)

Current as of: June, 1999
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340 /	HD	COMMUNICATIONS: ELECTRICAL

853.1	DF	WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.) {14}
856.3	DF	.~ Including particular sensor {1}
856.4		.~.~ Acoustic or vibratory (e.g., sonic, fluidic, etc.)

DEFINITION

Classification: 340/856.4

Acoustic or vibratory (e.g., sonic, fluidic, etc.):

(under subclass 856.3) Subject matter in which the sensor includes an element a portion of which either generates or is responsive to mechanical vibration.

SEE OR SEARCH THIS CLASS, SUBCLASS:

855.6, for this subject matter combined with subsurface digital processing circuitry.

SEE OR SEARCH CLASS

181, Acoustics,

101+, for acoustic geophysical or subsurface exploration not restricted to an electrical device.

367, Communications, Electrical: Acoustic Wave Systems and Devices, 81+, for an electrical wellbore telemetering system in which the signal is transmitted in the form of an acoustic wave.