Summary

Samuel Nelson Hartshorn v. Day — Opinion of the Court

The difficulties are in adjusting the rights and equities of the parties in a court of law; and hence, in the States where the two systems of jurisprudence prevail, of equity and the common law, a court of law refuses to open the question of fraud in the consideration, or in the transaction out of which the consideration arises, in a suit upon the sealed instrument, but turns the party over to a court of equity, where the instrument can be set aside upon such terms as, under all the circumstances, may be equitable and just between the parties. A court of law can hold no middle course
Source: Wikisource

Samuel Nelson Hartshorn v. Day — Opinion of the Court

With respect to all other persons, the power to license was annexed to the legal title which remained in Chaffee. Judson was authorized to sue infringers, but he was not required to do so. If the Goodyear licensees should not comply with the condition on which they were to receive a license to use the Chaffee patent, they might be sued as infringers, and Judson could reimburse himself out of the damages, or by compromising the suit by giving them a license on the terms required.
Source: Wikisource

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