US PATENT SUBCLASS 52 / 521
.~.~.~ Traversing surfacing

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

518  DF  LAPPED MULTIPLANAR SURFACING; E.G., SHINGLE TYPE {7}
519  DF  .~ Interfitted sections {14}
520  DF  .~.~ Fastener or anchor at juncture {1}
521.~.~.~ Traversing surfacing

DEFINITION

Classification: 52/521

(under subclass 520) Structure wherein the retainer passes entirely through at least one of the surface forming elements.