BLAND, Associate Judge.
The subject-matter of this appeal is an electrical aerial advertising sign. The United States Patent Office allowed certain of appellant's claims and rejected claims 4 and 7, from which action appeal has been taken to this court, and here claim 7 was abandoned, which leaves before this court claim 4, only, which reads as follows:
"4. The combination with a power driven aeroplane, of an electrical aerial sign or the like comprising one...
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