US PATENT SUBCLASS 52 / 590.3
.~.~.~ Having mortise with internal space


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

578  DF  MODULE OR PANEL HAVING DISCRETE EDGEWISE OR FACE-TO-FACE CONNECTING FEATURE {6}
589.1  DF  .~ Having integral key {3}
590.1  DF  .~.~ Dovetail-type key {2}
590.3.~.~.~ Having mortise with internal space


DEFINITION

Classification: 52/590.3

Having mortise with internal space:

(under subclass 590.1) Integral dovetail key wherein the fan-shaped indentation is designed to accommodate both the projection and; e.g., a settable material such as grout.