ALMOND, Judge.
This is an appeal from the decision of the Board of Appeals affirming the rejection under 35 U.S.C. § 103 of all of the claims in appellants' patent application.
The invention relates to the formation of hollow concrete slabs which are used as beams. The beams are formed by pouring concrete into a mold containing a central core element running the length of the mold. The concrete fills the void between the...
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