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Keywords

defendantappealburden of proofpatentrespondent
patentrespondent

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Bates v. Coe, 98 U.S. 31, 8 Otto 31, 1878 WL 18309, 25 L.Ed. 68

Facts

The complainant received a patent for a new and improved drilling and screw-cutting machine, which was later reissued. The respondents, accused of infringement, raised several defenses, including claims that the complainant was not the original inventor and that the invention had been publicly used prior to the patent application. The Circuit Court ruled against the respondents, leading to their appeal to the Supreme Court.

Improvements were made by the complainant in drilling and bolt-tapping machines, called in the specification a new and improved drilling and screwcutting machine.

Issue

Did the respondents successfully prove their defenses against the patent infringement claim?

Did the respondents successfully prove their defenses against the patent infringement claim?

Rule

In patent infringement cases, the burden of proof lies with the complainant to establish infringement. Defendants may assert special defenses, such as prior invention or public use, but must comply with statutory notice requirements. If any defense is proven, the judgment shall favor the defending party.

Persons sued as infringers may, if they comply with the statutory condition as to notice, give the special defences mentioned in the Patent Act in evidence, under the general issue.

Analysis

The court examined the evidence presented by the respondents regarding their defenses. It found that the evidence did not sufficiently overcome the presumption of validity afforded to the complainant's patent. The court ruled that the respondents failed to prove their claims of prior invention and public use, as required by law.

The court decided that the charge in this case was fully proved.

Conclusion

The Supreme Court upheld the Circuit Court's decision, affirming that the complainant was the original inventor and that the respondents had infringed on the patent.

The court confirmed the report of the master as to the amount awarded, and entered a final decree that the complainant recover of the respondents the sum of $290 and costs.

Who won?

The complainant prevailed in this case as the court found that the evidence presented by the respondents did not sufficiently challenge the validity of the patent. The court emphasized that the complainant's patent was prima facie evidence of invention, and the respondents failed to provide adequate proof to support their defenses.

The complainant prevailed in this case as the court found that the evidence presented by the respondents did not sufficiently challenge the validity of the patent.

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