US PATENT SUBCLASS 277 / 341
.~.~.~.~.~ Reinforcing feature

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

322  DF  SEAL FOR WELL APPARATUS {8}
336  DF  .~ For below ground apparatus {1}
337  DF  .~.~ Longitudinally actuated packer {2}
338  DF  .~.~.~ Packing sleeve {2}
340  DF  .~.~.~.~ Particular wall structure {1}
341.~.~.~.~.~ Reinforcing feature

DEFINITION

Classification: 277/341

Reinforcing feature:

(under subclass 340) Particular wall structure wherein the wall structure includes means to strengthen the wall.