KERNER, Circuit Judge.
This is an appeal from a decree dismissing plaintiff's suit for infringement of the Madsen patent, No. 1869760, issued August 2, 1932, and disclosing a weatherproof window construction. The District Court held claims 10, 13 and 14 of the patent invalid in view of prior patents.
The patentee's claim 10, typical of the others, is copied in footnote
Prior to 1932 most of the windows commercially used...
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