US PATENT SUBCLASS 342 / 459
.~.~ Underground object location

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

350  DF  DIRECTIVE {10}
450  DF  .~ Position indicating (e.g., triangulation) {11}
459.~.~ Underground object location

DEFINITION

Classification: 342/459

Underground object location:

(under subclass 450) Subject matter wherein the position of an atmosphere disturbance or nuclear detonation is determined.