US PATENT SUBCLASS 52 / 169.13
.~ Shaft; i.e., elongated rigid structure

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

169.1  DF  SPECIFIED TERRANEAN RELATIONSHIP {11}
169.13.~ Shaft; i.e., elongated rigid structure

DEFINITION

Classification: 52/169.13

(under subclass 169.1) Structure which is an elongated rigid substantially upright member, e.g., column, pole post, etc.