US PATENT SUBCLASS 324 / 74
TESTING AND CALIBRATING ELECTRIC METERS (E.G., WATT-HOUR METERS)

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

74TESTING AND CALIBRATING ELECTRIC METERS (E.G., WATT-HOUR METERS) {1}
75  DF  .~> By stroboscopic means

DEFINITION

Classification: 324/74

(under the class definition) Subject matter for testing and calibrating electric meters.

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130, for electric meters, per se, having self-calibrating features.

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73, Measuring and Testing,

1.01+, for the proving or calibrating of mechanical instruments.

374, Thermal Measuring and Testing, 1+, for calibration or testing of a thermally responsive instrument.

702, Data Processing: Measuring, Calibrating, or Testing,

85+, for calibration or correction system, subclasses 108+ for testing systems.