US PATENT SUBCLASS 342 / 31
.~.~ Including synchronized clock

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

29  DF  AIRCRAFT COLLISION AVOIDANCE SYSTEM (CAS) {1}
30  DF  .~ With transponder {2}
31.~.~ Including synchronized clock

DEFINITION

Classification: 342/31

Including synchronized clock:

(under subclass 30) Subject matter including means to operate plural transponders on separate aircraft or on the ground, on a common time base.

SEE OR SEARCH CLASS

368, Horology: Time Measuring Systems or Devices,

47, for wireless synchronization of timepieces, per se.