US PATENT SUBCLASS 249 / 37
.~.~.~.~.~ Means forming spaced hollow vertical shafts in wall

Current as of: June, 1999
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249 /   HD   STATIC MOLDS

1  DF  IN SITU CONSTRUCTION ENGINEERING TYPE OR BUILDING TYPE-MOLD OR FORM {4}
13  DF  .~ Forming building structure {5}
18  DF  .~.~ Barrier or sustainer, e.g., wall, joist, etc. {5}
33  DF  .~.~.~ Planar wall mold having opposed spaced panels {6}
36  DF  .~.~.~.~ Including means for forming spaced oposed walls or hollow wall {2}
37.~.~.~.~.~ Means forming spaced hollow vertical shafts in wall

DEFINITION

Classification: 249/37

(under subclass 36) Apparatus having means to form vertical shafts in a wall.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

302.1+, especially subclass 302.2 for formed structures having passages therein.