US PATENT SUBCLASS 52 / 721.5
.~.~.~.~.~ Partial sleeve or collar

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  DF  .~.~ Upright {3}
721.3  DF  .~.~.~ Sustainer {1}
721.4  DF  .~.~.~.~ Having outer layer or shell {1}
721.5.~.~.~.~.~ Partial sleeve or collar

DEFINITION

Classification: 52/721.5

Partial sleeve or collar:

(under subclass 721.4) Structure including a covering which circumferentially envelopes only a portion of the longitudinal dimension of the shaft.