About: Evans v. Eaton (1822)

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Evans v. Eaton, 20 U.S. (7 Wheat.) 356 (1822), was a United States Supreme Court case in which the Court held, chiefly, that a patent on an improved machine must clearly describe how the machine differs from the prior art. It was the fourth published Supreme Court decision on patents, and the second to deal with substantive patent law. It was also the third of four successive Supreme Court cases related specifically to the Oliver Evans flour mill patent.

Property	Value
dbo:abstract	Evans v. Eaton, 20 U.S. (7 Wheat.) 356 (1822), was a United States Supreme Court case in which the Court held, chiefly, that a patent on an improved machine must clearly describe how the machine differs from the prior art. It was the fourth published Supreme Court decision on patents, and the second to deal with substantive patent law. It was also the third of four successive Supreme Court cases related specifically to the Oliver Evans flour mill patent. (en)
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dbp:case	Evans v. Eaton, (en)
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dbp:decidedate	0001-03-20 (xsd:gMonthDay)
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dbp:dissent	Livingstone (en)
dbp:fullname	Oliver Evans v. Eaton (en)
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dbp:holding	A patent on an improved machine must clearly set forth how the invention differs from the prior art. (en)
dbp:joindissent	Johnson, Duvall (en)
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dbp:justia	https://supreme.justia.com/cases/federal/us/20/356/
dbp:lawsapplied	Patent Act of 1793, An Act for the Relief of Oliver Evans) (en)
dbp:litigants	Evans v. Eaton (en)
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dbp:prior	Writ of error from District of Pennsylvania, where case had been remanded following previous Supreme Court case overturning the original district court judgment. (en)
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rdfs:comment	Evans v. Eaton, 20 U.S. (7 Wheat.) 356 (1822), was a United States Supreme Court case in which the Court held, chiefly, that a patent on an improved machine must clearly describe how the machine differs from the prior art. It was the fourth published Supreme Court decision on patents, and the second to deal with substantive patent law. It was also the third of four successive Supreme Court cases related specifically to the Oliver Evans flour mill patent. (en)
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