US PATENT SUBCLASS 342 / 48
.~.~.~ With automatic lock-on

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

42  DF  RADAR TRANSPONDER SYSTEM {6}
46  DF  .~ Navigational {1}
47  DF  .~.~ Distance measuring equipment (DME) {2}
48.~.~.~ With automatic lock-on

DEFINITION

Classification: 342/48

With automatic lock-on:

(under subclass 47) Subject matter wherein the interrogator station includes circuit means which is self-activating to lock-on the reply signal.