US PATENT SUBCLASS 52 / 721.2
.~.~ Upright

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}
721.1  DF  .~ Stone-like component (e.g., concrete, etc.) {2}
721.2.~.~ Upright {3}
721.3  DF  .~.~.~> Sustainer {1}
722.1  DF  .~.~.~> Conduit
723.1  DF  .~.~.~> Having shell-like outer layer {1}

DEFINITION

Classification: 52/721.2

Upright:

(under subclass 721.1) Structure wherein the longitudinal axis of the shaft is vertical when in its utilitarian position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

726.3+, upright comprising end-to-end connected sections.