US PATENT SUBCLASS 340 / 855.8
.~ Including specified power transmission feature or source (e.g., battery, 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}
855.8.~ Including specified power transmission feature or source (e.g., battery, etc.) {1}
855.9  DF  .~.~> Specified alternating current (A.C.) circuit feature

DEFINITION

Classification: 340/855.8

Including specified power transmission feature or source (e.g., battery, etc.):

(under subclass 853.1) Subject matter having a particularly described feature of circuitry providing electric power to the subsurface communications equipment.

(1) Note. A named or nominal inclusion of a power transmission device is not classified in this or its indented subclasses.

(2) Note. This subclass includes circuitry for separating an information carrying signal and an electrical power signal.