US PATENT SUBCLASS 52 / 656.6
.~.~.~.~ Metal sash or frame

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

633  DF  OPENWORK; E.G., TRUSS, TRELLIS, GRILLE, SCREEN, FRAME, OR REBAR CHAIR {12}
656.1  DF  .~ Outside corner or peripherally bordered (i.e., framing, etc.) {5}
656.2  DF  .~.~ Portal frame or closure frame {4}
656.5  DF  .~.~.~ For window {1}
656.6.~.~.~.~ Metal sash or frame

DEFINITION

Classification: 52/656.6

Metal sash or frame:

(under subclass 656.5) Subject matter wherein the components comprising the structure are made of metal.