US PATENT SUBCLASS 52 / 220.8
.~ Having a passageway through the entire wall, ceiling, or floor thickness (e.g., poke-through)

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

220.1  DF  WALL, CEILING, OR FLOOR DESIGNED FOR UTILITIES {6}
220.8.~ Having a passageway through the entire wall, ceiling, or floor thickness (e.g., poke-through)

DEFINITION

Classification: 52/220.8

Having a passageway through the entire wall, ceiling, or floor thickness (e.g., poke-through):

(under subclass 220.1) Wall, ceiling, or floor in which an opening, made at the smallest wall, ceiling, or floor dimension, provides access from one side of; e.g., a wall, to the other side for the utility to pass through.