US PATENT SUBCLASS 52 / 21
.~ Masonry or concrete


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

19  DF  WITH ENTRANCE FOR PERSONS OR OBJECTS IN HORIZONTAL OR INCLINED COVER {2}
21.~ Masonry or concrete


DEFINITION

Classification: 52/21

(under subclass 19) Structure including a masonry or concrete component which is constructed entirely of masonry or concrete.