MR. JUSTICE FIELD delivered the opinion of the court.
In the court below, the defendant questioned the validity of the surrender of the original patent and of the reissue; but, from the view we take of the alleged invention or discovery, it is unnecessary to consider this point. We shall treat the reissue as for the same invention or discovery, differing in no substantial particular from that originally patented. In the specification accompanying the reissue, the...
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