US PATENT SUBCLASS 52 / 451
.~.~ Laminated on planar sheet

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

443  DF  WITH MEANS (E.G., APERTURES, PROJECTIONS) FOR RECEIVING SETTABLE MATERIAL FACING (E.G., PLASTER) {8}
450  DF  .~ Corrugated {2}
451.~.~ Laminated on planar sheet

DEFINITION

Classification: 52/451

(under subclass 450) Structure wherein the sheet has secured

thereto a flat-surfaced sheet in coextensive contact therewith.

SEE OR SEARCH THIS CLASS, SUBCLASS:

408+, for an imperforate sheet laminated between opposed material layers.