MR. JUSTICE SWAYNE delivered the opinion of the court.
These are cross-appeals in the same cause. Both involve questions in mechanics. These being determined, the legal propositions which apply are so well settled as to admit of no controversy.
A patent was granted to Blake on the 15th of June, 1858, by the United States, for a stone-breaker. On the 9th of January, 1866, the same authority reissued the patent to him, with amended specifications. It was extended...
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