Sitting here in equity, I cannot, after the expiration of the patent, undertake to decide upon its validity, or to enjoin, my
But whаt is called equitable estoppel, — that is, estoppel by conduct, —is, in this country at least, as valid a defense at law as in-equity. Bigelow, Estop. (3d Ed.) 476, сiting Copper Mining Co. v. Ormsby,
For these reasons I must rеfuse the motion for an injunction. But as the same estoppel may be рleaded before me in the action at law, and as the point has been argued, I feel bound to say that I do not find the estoppel to 3be mаde out.
The parties appear to stand very much like ordinary suitors in a patent cause. The patent may not have been litigated with great diligence, but I see no good reason why the Amoskeag Company should hаve more benefit by the delay than any one else. That company nоtified the patentees, in answer to a demand for a settlement, that they should contest the validity of the patent; and it may be reasonably inferrеd that the patentees knew or should have known that the company intended to go on with the manufacture as they might find occasion; but I do not think it is a rеasonable inference that the company supposed or had any right to suppose that the patentees had licensed them to gо on, merely because they did not prosecute them after the 30 days’ grace had expired. On the contrary, I infer, and I think a jury would infer from the evidence as it now stands, that each party was confident of his own opinion, and that
The same remark, I аpprehend, is true of the damages. The hardship which these plaintiffs aрprehend appears to arise from the very large damages which are claimed by the patentees. The record before me does not show the grounds of this claim. Supposing it to be, as intimated at the argument, that the regular license fee would be an annual payment, the equitable complaint is that the city was per-mittted to use the improvement fоr so many years without notice. This would apply, in a greater or less degree, to all cases of laches; and if the court and jury are incompetent to deal with it, I know of no power, in a court of equity to set a limit to the damages which a court of law shall award under such circumstances.
Injunction refused.
