US PATENT SUBCLASS 340 / 637
.~.~.~ Watt-hour meter

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

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
635  DF  .~.~ Condition of electrical apparatus {15}
637.~.~.~ Watt-hour meter

DEFINITION

Classification: 340/637

Watt-hour meter:

(under subclass 635) Subject matter where the monitored device is a watt-hour meter.

(1) Note. This subclass pertains to a meter condition, not power consumption, per se.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing,

74, for testing watt-hour meters.