Wallace & Tiernan, as exclusive licensee of a patent for a process for purifying water, sued the city of Syracuse for infringement, and got an interlocutory decree referring the damages to a master. The city had used the patent in two installations, one at its city water supply, and the other at a swimming pool at one of its public schools. All the apparatus in question installed at the water supply was necessary to practice the process, but only 28 per cent, of that installed at the. pool. The plaintiff had bid upon both jobs, $1,400 for the water supply, and $1,825 for the swimming pool; the city accepted lower bids from the manufacturer of the infringing apparatus, who defends the suit.
Before the master the plaintiff, by its general sales manager, proved what it called a fixed royalty computed at twenty-five per cent, of the cost of installation, and ten dollars a month, while the apparatus was used. It did not prove what would have been its profits on the jobs, had the ci.ty accepted its bids, nor that the supposed royalties had been accepted by users of its patent in more than eight instances in three years. Most of its work was installing its own apparatus; but it had sent out to infringers some one hundred letters demanding the royalty so fixed, with the foregoing result. If not a fixed royalty, it contended that the amount was at least a reasonable royalty, and this it supported by the manager’s opinion. The master accepted the evidence of a royalty as so given, and recommended that the damages should be trebled. The judge confirmed his report and entered a final decree. The defendant appealed.
It is conceded that the defendant got no profits from using the patented invention, so that the case is one for damages only. Section 70 of title 35, U. S. Code (35 USCA § 70), provides that if the plaintiff in a suit for infringement has suffered damage, “but that such damages * * * are not susceptible of calculation and ' determination with reasonable certainty,” the court may resort to a reasonable royalty. Before it was enacted, the rule had not been different' (Hunt, etc., Co. v. Cassiday,
We think the evidence insufficient to establish a fixed royalty. The plaintiff has not secured an acceptance by the trade at large of its terms; eight instances in three years is not enough. Rude v. Westcott,
The evidence of lost sales was sufficient, since the plaintiff had bid on both jobs, and stood willing to do the work. Its installation would have been a license to use the process, and the city had prescribed it for the work; it was reasonably certain that it would have accepted the plaintiff’s bids, if the infringing manufacturer had kept out of the field. The damages recoverable may bo taken either as the whole profits on the job, after deducting general overhead, selling cost and the like, or as these, less a reasonable profit of manufacture. Justice Nelson in McCormick v. Seymour, Fed. Cas. No. 8727, adopted the second standard in charging the jury, but the plaintiff did not except to it, and the affirmance (Seymour v. McCormick,
The swimming pool raises another question. The infringing apparatus was only twenty-eight per cent, in value of the whole bid, and the parts are separable, those necessary to the practice of the process being quite distinct from the rest. One way would be to allocate a fair manufacturing profit upon the unpatented part and to allow the balance as pi'ofits
on the
patent. Another would be
to
say that the damage from lost sales could not he proved at all, and that recourse should be had to a reasonable royalty. Even so, patently the profits on the whole job would always be a limit upon the recovery, since by no possibility can the plaintiff suffer more. We think, however, that the question is rather of apportioning a known loss than of finding a tolerable substitute, for that is in substance what we do when we fix a reasonable royalty. Hence it seems to us, as intimated in National Folding-Box
&
Paper Co. v. Elsas, that the proper method is to deduct from the whole profits on the job, after proper allowance for overhead and the like, a reasonable manufacturing profit upon the unpatented part of the apparatus and to allow the remainder as damages. This apportionment is not difficult, as in the case of an improvement patent, though even then the plaintiff has prima facie the burden of separating the two. Westinghouse, etc., Co. v. Wagner Mfg. Co.,
The award of treble damages we will not disturb. A.t best it is one primarily in the discretion of the District Court (Fox v. Knickerbocker Engraving Co.,
Decree reversed and cause remanded with instructions to proceed in conformity with the foregoing.
