GRAHAM, Presiding Judge.
Oscar P. Nystrom and Charles H. Landwehr, residing at Holland, Mich., filed their application on December 5, 1927, for an improved cold air circulator for warm air furnaces. The nature of this improvement is sufficiently shown, for the purposes of this case, by the counts of the interference hereinafter quoted.
On December 29, 1928, Benjamin J. Mancuso, of Batavia, N. Y., filed his application in the United States Patent Office for...
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