US PATENT SUBCLASS 52 / 606
.~ With traversing passage

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

596  DF  OPAQUE STONELIKE MODULE {9}
606.~ With traversing passage {1}
607  DF  .~.~> Additional intersecting, transversing passage, or groove

DEFINITION

Classification: 52/606

(under subclass 596) Structure including a module having a passage which extends completely through the module.

SEE OR SEARCH THIS CLASS, SUBCLASS:

503, for a barrier with a through passage and see the search notes therein for other constructions with internal passages or spacers.

SEE OR SEARCH CLASS

138, Pipes and Tubular Conduits, appropriate subclasses for tubular wall structure,

115+, for pipes in the form of a module having plural passages and see the reference to Class 138 in the class definition of Class 52.