US PATENT SUBCLASS 285 / 371
.~.~.~ With external

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

335  DF  PACKED {20}
369  DF  .~ Sleeve {2}
370  DF  .~.~ Internal {1}
371.~.~.~ With external

DEFINITION

Classification: 285/371

(under subclass 370) Subject matter also including an external tubular section overlapping the engaging pipe ends.