US PATENT SUBCLASS 340 / 553
.~.~.~.~ Standing waves

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

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
541  DF  .~.~ Intrusion detection {8}
552  DF  .~.~.~ Disturbance of electromagnetic waves {3}
553.~.~.~.~ Standing waves

DEFINITION

Classification: 340/553

Standing waves:

(under subclass 552) Subject matter wherein the electromagnetic waves are stationary (i.e., have maxima and minima at fixed positions).