54 F. 169 | U.S. Circuit Court for the District of Eastern Pennsylvania | 1889
The suit is for infringing letters patent No. 14,873 — “Designs for Lamp Chimneys” — granted to George A. Macbeth, assignee of Henry Dietrich, October 30, 1883. This patent was involved in a suit by the same plaintiffs against Evans & Co.,
Nothing remains but to. determine whether the defendants’ “prism-top” chimney, is an infringement. When the case was before us on motion for preliminary injunction, we were not satisfied it was an infringement, and we therefore refused to include it in the writ issued. When application for the patent was originally made the patentee claimed not only the “pearl top,” but also two other designs, one of which was substantially, if not absolutely, identical with the defendants’ “prism top” — as appears by the drawings filed. He was informed by the office that these several designs could not be embraced in the letters applied for; whereupon he amended the application, withdrawing therefrom everything except the pearl top, — illustrated by the figures accompanying the patent. In view of these facts he cannot now be permitted to claim that the letters cover the top in question. If it were proved, as he asserts, that the patent might, in the absence of these facts, be- construed to embrace it — that the office was . mistaken, and he was misled — the result would be the same. He cannot be permitted to turn round after obtaining a patent on the only terms upon which the office would grant it, and after declaring by his conduct, and language as emphatic as he could employ, that this top is not embraced, hold those who have engaged in its manufacture, guilty of infringement. He is estopped by the circumstances under which the patent was obtained. The case cannot be distinguished in principle, from those in which a patentee at the instance of the office, or to avoid some obstacle in his way, disclaims a part of his original demand. Here, as there, the part yielded and abandoned, cannot subsequently be set up as protected by the patent. The argument based on the fact that the language of the claim was not-changed, has little force. The patentee having agreed to omit this top, and obtaining Ms patent by this means, the claim must be read accordingly, even though this may limit the scope to wMch it otherwise would be entitled;
We attach little importance to his subsequent conduct in applying for and taMng the “Macbeth patent.” If it is virtually for the same top as that withdrawn from the former patent, his conduct in taking
No opinion rendered.