Summary

Joseph P. Bradley Powder Company v. Powder Works…

If the last patent differs from the first only in stating more clearly and definitely the real principles of the invention, so that those who wish to pirate it may not be allowed to escape with impunity through the imperfection of the language used in the first, there has arisen one of the cases for which it was the intention of the act of Congress to provide, and the objection is worthless in point of law.' This case is partially reported in 2 Wall.
Source: Wikisource

Joseph P. Bradley Powder Company v. Powder Works…

It is apparent, they say, that the original patent was for a process, to wit, a mode, or different modes, of exploding nitroglycerine; whereas the reissues are for manufactured compounds or mixtures, namely, mixtures of nitro-glycerine with gunpowder, gun-cotton, and rocket powder. It is contended that a process and a mixture are the subjects of different inventions; that a patent granted for one cannot, by its surrender, be the basis of a reissued patent for the other.
Source: Wikisource

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