US PATENT SUBCLASS 405 / 252.1
.~.~ Pile having screw threads

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

229  DF  FOUNDATION {2}
231  DF  .~ Columnar structure (e.g., pier, pile) {7}
252.1.~.~ Pile having screw threads

DEFINITION

Classification: 405/252.1

Pile having screw threads:

(under subclass 231) Subject matter comprising a pile having helical ribs thereon enabling said pile to be screwed into the ground.

SEE OR SEARCH THIS CLASS, SUBCLASS:

224+, for pile with screw threads in a marine environment.