US PATENT SUBCLASS 324 / 88
.~.~.~ Cathode ray

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

76.11  DF  MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE {46}
76.77  DF  .~ Phase comparison (e.g., between cyclic pulse voltage and sinusoidal current, etc.) {11}
87  DF  .~.~ With nonlinear device (e.g., saturable reactor, rectifier), discharge device (e.g., gas tube) or lamp {2}
88.~.~.~ Cathode ray

DEFINITION

Classification: 324/88

(under subclass 87) Subject matter having a cathode ray tube.

(1) Note. The cathode-ray tube usually serves as an indicator, but not necessarily so.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

364+, for cathode-ray tubes, per se.

315, Electric Lamp and Discharge Devices: Systems, 1+, for cathode- ray tube circuits of general application.