MARTIN, Chief Justice.
This is an appeal from a decision of the Commissioner of Patents, refusing to allow any of the claims in the case.
The invention relates to an improvement in the construction or preparation of the matrices used in type-casting machines like the linotype, employed in the art of printing. The matrix used in such machines is a thin, generally rectangular, brass plate, having on one edge a mold from which a letter is cast, and on the opposite...
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