US PATENT SUBCLASS 340 / 870.25
.~ Phase variation

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

870.01  DF  CONTINUOUSLY VARIABLE INDICATING (E.G., TELEMETERING) {15}
870.25.~ Phase variation

DEFINITION

Classification: 340/870.25

Phase variation:

(under subclass 870.01) Subject matter in which the intelligence is transmitted over the telemetered system by means of phase shift.

(1) Note. Representation of the analog value telemetered by phase control will be found in the claim language.

(2) Note. Phase shift is the difference between corresponding points on input and output signal wave shapes expressed as degrees lead or lag.

SEE OR SEARCH THIS CLASS, SUBCLASS:

870.18, for particular phase modulation.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems,

212+, for phase variation in phase control. 332, Modulators,

144+, for phase modulation, per se.

370, Multiplex Communications,

215, for phase modulation in multiplex communications.

455, Telecommunications,

110+, for angle modulation in telecommunication.