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Keywords

patent

Related Cases

Miller v. Bridgeport Brass Co., 104 U.S. 350, 14 Otto 350, 1881 WL 19813, 26 L.Ed. 783

Facts

This case involves a patent infringement suit brought by Edward Miller & Co. against The Bridgeport Brass Company regarding a patent for an improvement in lamps originally granted to Joshua E. Ambrose on October 16, 1860. The patent was extended and underwent two reissues, with the second reissue occurring in January 1876. The court found that the second reissue was not for the same invention as described in the original patent, as it altered the fundamental nature of the invention from a double dome without a chimney to a single dome with a chimney.

This is a suit brought by Edward Miller & Co. against The Bridgeport Brass Company to restrain the infringement of a patent, and for an account of profits, &c. The patent was for an alleged improvement in lamps, and was originally granted to Joshua E. Ambrose, Oct. 16, 1860, for fourteen years, and was extended for seven years longer.

Issue

Whether the second reissue of the patent was valid given the delay in application and the nature of the claims made.

Rule

A reissued patent can only be granted to correct an actual mistake in the original patent, not to broaden claims based on mere errors of judgment. The law requires that any application for reissue must be made with due diligence, and unreasonable delay can render the reissue void. The dedication of unclaimed devices to the public occurs when a specific device or combination is claimed, and the omission of others is apparent.

A claim may be enlarged in a reissued patent only when an actual mistake has occurred and not from a mere error of judgment.

Analysis

In this case, the court analyzed the differences between the original patent and the reissued patent. The original patent claimed a combination of devices, including a double dome without a chimney, while the reissue claimed a single dome with a chimney. The court determined that this change was not merely a correction of an inadvertent mistake but a significant alteration that broadened the scope of the patent. The patentee's delay of fifteen years in seeking the reissue was deemed unreasonable, leading to the conclusion that the reissue was contrary to law.

The only mistake suggested is, that the claim was not as broad as it might have been. This mistake, if it was a mistake, was apparent upon the first inspection of the patent, and if any correction was desired, it should have been applied for immediately.

Conclusion

The court affirmed the lower court's decision, holding that the second reissue of the patent was void due to the unreasonable delay in applying for it and the substantial changes made to the claims.

We think that the delay in this case was altogether unreasonable, and that the patent could not lawfully be reissued for the purpose of enlarging the claim and extending the scope of the patent.

Who won?

The court ruled in favor of The Bridgeport Brass Company, concluding that the reissued patent was invalid. The court emphasized that the patentee's delay in seeking reissue and the nature of the changes made to the claims were significant factors in determining the outcome. The court's reasoning highlighted the importance of maintaining the integrity of patent claims and protecting the public from unjust expansions of patent rights.

The court ruled in favor of The Bridgeport Brass Company, concluding that the reissued patent was invalid.

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