US PATENT SUBCLASS 52 / 524
.~.~.~ Interfitting slits

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}
523  DF  .~.~ Edge and slit {2}
524.~.~.~ Interfitting slits

DEFINITION

Classification: 52/524

(under subclass 523) Structure in which one section is provided with a slit extending inwardly from an edge thereof, which slit interfits with similarly disposed slit in the adjacent section.