US PATENT SUBCLASS 52 / 740.3
.~.~ Ribbed

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

720.1  DF  SHAFT (I.E., ELONGATED RIGID STRUCTURE) {15}
740.1  DF  .~ Tension member (e.g., re-bar) {5}
740.3.~.~ Ribbed {2}
740.4  DF  .~.~.~> Longitudinal
740.5  DF  .~.~.~> Spiral

DEFINITION

Classification: 52/740.3

Ribbed:

(under subclass 740.1) Structure having elongated, raised ridges or grooves.