GRAHAM, Presiding Judge.
Mortimer filed his application in the United States Patent Office for a patent on improvements in shingle strips, such as are usually made by saturating a felt base with a waterproofing material, coating the same with a plastic material and applying thereto a layer of mineral wear-resisting material. The Examiner and Board of Appeals rejected all the claims, but on different grounds. The Board of Appeals based its rejection on reference to...
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