WOOLLEY, Circuit Judge.
A. B. Dick Company, assignee of Letters Patent No. 1,536,982, issued to Edward W. Hill, brought this suit for infringement. From an interlocutory decree holding certain claims valid and infringed, the defendants appealed.
The patent is for a "stencil-sheet" which in its elemental form is a sheet of paper, of typewriter size, so prepared that letters can be cut or impressed upon its surface by the letter-hammers of a typewriter and,...
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