US PATENT SUBCLASS 455 / 67.6
.~.~ Phase measuring (e.g., group delay, propagation effects, etc.)

Current as of: June, 1999
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39  DF  TRANSMITTER AND RECEIVER AT SEPARATE STATIONS {14}
67.1  DF  .~ With measuring, testing, or monitoring of system or part {6}
67.6.~.~ Phase measuring (e.g., group delay, propagation effects, etc.)

DEFINITION

Classification: 455/67.6

Phase measuring (e.g., group delay, propagation effect, etc.):

(under subclass 67.1) Subject matter including means to measure the change in phase of travelling waves for developing a suitable control for equalization, attenuation compensation, or synchronization.