US PATENT SUBCLASS 175 / 20
.~ Combined with earth removal (e.g., removing sample)

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

19  DF  BORING WITHOUT EARTH REMOVAL (I.E., COMPACTING EARTH FORMATION) {3}
20.~ Combined with earth removal (e.g., removing sample)

DEFINITION

Classification: 175/20

(under subclass 19) Subject matter including in addition to boring without earth removal, the step or means for removing earth, (e.g., boring without earth removal followed by taking a sample).

SEE OR SEARCH THIS CLASS, SUBCLASS:

405, and search there noted for core receiver driven into formation.