US PATENT SUBCLASS 52 / 302.4
.~.~ Composed of interfitting blocks

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

302.1  DF  WALL, CEILING, FLOOR, OR ROOF DESIGNED FOR VENTILATION OR DRAINAGE {5}
302.3  DF  .~ With the vent or drain entirely along at least one substantial dimension (e.g., length, not thickness) {1}
302.4.~.~ Composed of interfitting blocks

DEFINITION

Classification: 52/302.4

Composed of interfitting blocks:

(under subclass 302.3) Hollowed wall, ceiling, floor, or roof wherein the hollow-type area is constructed from a hand-carried rectangular building unit attached to similar building units to form an; e.g., wall.

SEE OR SEARCH THIS CLASS, SUBCLASS:

415+, for modules bonded by internal settable material.

503+, for hollow modules that form through passages in a barrier interior.

592.6, for modular panel or block with integral key designed for stacking.

606+, for an opaque stonelike module with a passage.