US PATENT SUBCLASS 324 / 89
.~.~.~ Space discharge control means (e.g., grid)

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}
89.~.~.~ Space discharge control means (e.g., grid)

DEFINITION

Classification: 324/89

(under subclass 87) Subject matter having a space discharge device of the discharge control type.

(1) Note. The discharge may be controlled, for example, by means of a grid or by means of a magnetic field. The space discharge device may be of either the vacuum, gas or vapor type.