US PATENT SUBCLASS 166 / 337
.~.~ For leak

Current as of: June, 1999
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166 /   HD   WELLS

335  DF  SUBMERGED WELL {10}
336  DF  .~ Testing {1}
337.~.~ For leak

DEFINITION

Classification: 166/337

For leak:

(under subclass 336) Process, apparatus, or device including means for determining if the structure of the well is sufficiently tight to hold fluid therein.