Plaintiff sues as assignee of a contract made between one Isse Seligstein and the defendant, whereby said Seligstein, who was the sole owner of letters patent for a folding clothing, millinery .or suit box, known by the trade name as “The Lightning Box,” granted to defendant the exclusive right to manufacture and sell said patented box within the border lines of some eleven States and the District of Columbia, including all the eastern and middle States. It was mutually agreed between the parties to the agreement that said exclusive right was sold upon certain “terms and conditions.”
Defendant on its part agreed to pay to said Seligstein royalties at a specified rate upon all boxes sold, and expressly agreed “that the payment by the said The National Folding Box Sc Paper Company to said Seligstein for the right to manufacture and sell boxes under said Letters Patent shall not be less than the sum of five hundred dollars ($500) for each and every year during the life of this contract.”
Seligstein on his part agreed (1) that he would “ faithfully protect said Letters Patent from any and all substantial infringements of said Letters Patent; ” and (2) that during the life of this contract he “ will not sell within the territory, above described, any box manufactured under said Letters Patent * * *, nor any other clothing, millinery or suit box, and further that he will not during the life of this contract sell any rights for any clothing, millinery or suit bow to any one for the territory heretofore described. ”
The contract was dated in March, 1909, and was to run for five years, with an option to defendant to renew it for a further term of five years, and on the expiration of that term to renew it for the lifetime of the patent.
Soon after the execution of this contract defendant discovered that other persons were selling, within the aforesaid territory, *608folding boxes which it believed, and apparently with reason, to be infringements of the patent mentioned in the foregoing contract. This competition, as • may safely be inferred from the evidence, greatly interfered with its efforts to sell folding boxes under the license agreement with Seligstein, and in no year did the specific royalties upon the boxes sold amount to the stipulated minimum of $500. Defendant notified Seligstein of this apparent infringement, but the latter made no effort to protect his patent or his license. Defendant has fully paid all of the specific royalties at the agreed rates upon all of the boxes sold by it, but has refused to pay the difference between that amount and the stipulated minimum gross royalties of $500 for each year of the contract term. It is for this difference that plaintiff, as assignee of Seligstein, now sues. On January 22, 1912, Isse Seligstein executed a written assignment to plaintiff of his entire right, title and interest in and to the above-mentioned letters patent (with others), and further sold, assigned and transferred to said plaintiff “ all of my right, title and interest in, to and under a certain written contract between myself and the National Folding Box & Paper Company, dated the — day of March, 1909,” being the contract now sued upon.
The defendant had no knowledge of the execution of this last-mentioned agreement, never consented to it, and never in any way accepted plaintiff as a contractor with it in place of Seligstein.
It continued to draw checks for the earned royalties to the order of Seligstein, and so careful was plaintiff that defendant should not learn of Seligstein’s assignment of the letters patent and contract" that it accepted defendant’s checks to Seligstein’s order, indorsing them with a simulated indorsement of Seligstein’s name.
The defendant, by way of answer to plaintiff’s complaint, sets up various defenses and counterclaims, some of which it will be necessary to consider. The trial court properly, as we think, dismissed the counterclaims, and submitted the cause to the jury upon the complaint and defenses.. The plaintiff had a verdict which the trial justice, on motion, set aside, and thereupon dismissed the complaint upon the ground, expressed in a careful opinion (91 Misc. Rep. 405), that Seligstein by assign' *609ing all of his right, title and interest in the letters patent had incapacitated himself from fulfilling his agreement to “faithfully protect ” said patent from infringement, and thereby committed the first breach, equivalent to an anticipatory refusal to perform. The Appellate Term seems to have entertained a somewhat different opinion, and consequently reversed the order of the trial justice and reinstated the verdict. The respondent seeks to sustain the order of the Appellate Term now appealed from by arguing that even if Seligstein was guilty of a breach of his agreement to protect the patent, yet that his agreement so to do was an independent covenant the breach of which would not operate as a bar to a recovery of the royalties, but would only serve as the basis of a separate action for damages. To support this argument certain cases are cited which, when properly considered, bear slight resemblance to the case at bar. ' They are all actions to recover royalties which have been actually earned, or rent for a term which has actually been enjoyed, while here the only claim contested is for royalties which have not been earned, and to earn which the defendant relied upon Seligstein’s agreement to protect his patent. The distinction appears to us to be quite obvious.
We do not think, however, that Seligstein’s undertaking to protect the patent can properly be classed as an independent covenant, but rather that it is concurrent and dependent. How such mutual covenants are to be classed is always a matter of intention to be determined from the terms and language of the contract, with a strong tendency on the part of the courts at the present day to treat mutual covenants as dependent, unless the clear language of the contract is to the contrary, upon the ground that such a construction will in general produce the most fair and just results. The rule to be applied is thus stated by Mr. Benjamin: “ Where from a consideration of the whole instrument it is clear that the one party relied upon his remedy, and not upon the performance of the condition by the other, such performance is not a condition precedent. But if the intention was to rely on the performance of the promise, and not on the remedy, the' performance is a condition precedent.” (Benj. Sales [7th ed.], § 562, subd. 5.) Applying *610that rule to the present case it will readily be seen that there is no indication that defendant ever intended to rely upon its action for damages as a complete satisfaction for Seligstein’s refusal or neglect to protect the patent. Such an action would almost inevitably be most unsatisfactory by reason of the very-apparent difficulties in the way of actually proving the amount of damage suffered. On the other hand, defendant’s success in making and selling the patented article- would depend almost entirely on its protection from infringement and no one could afford such protection except the owner of the patent right, for he alone had a standing to sue. Nothing is more natural or more probable than that, when defendant covenanted that the royalties upon the sales would amount to at least $500 per annum, it relied and calculated upon enjoying within the stipulated territory the monopoly of making and selling boxes under Seligstein’s letters patent, a monopoly which Seligstein had concurrently covenanted to “ faithfully protect.” When Seligstein refused so to protect the patent, or, what comes to the same thing, put it out of his power to do so, the consideration upon which defendant undertook that the royalties should amount to a fixed minimum sum per annum utterly failed. (Wilfley v. New Standard Concentrator Co., 164 Fed. Rep. 421.)
It is to be observed that the contract between Seligstein and defendant was one which, from its veiy nature, was to remain executory during its full term, and never was until the end of that term “ fully performed,” as .the Appellate Term seems to have considered that it had been, for the obligation of Seligstein to protect the patent, and of defendant to pay royalties was continuous. The contract could never, therefore, become fully executed until it was terminated.
Nothing is better settled in the law than that where one party to. an executory contract prevents the performance of it, or puts it out of his own power to perform it he has committed a breach of the contract which relieves the other party from the obligation of full performance on his part. (Lovell v. St. Louis Mut. Life Lns. Co., 111 U. S. 264, 274.) It would needlessly extend the limits of this opinion to cite other authorities, of which there are many, for so well settled a proposition.
*611If then Seligstein, by his assignment to plaintiff of all his right, title and interest in and to the letters patent in question had put it out of his own power to fulfill his concurrent obligation to protect and defend the patent he committed a breach of the contract which relieved defendant from the obligation of full performance.
That Seligstein did so put it out of his power is obvious, and it is not seriously disputed. Having parted with all right, title and interest in the letters patent he clearly had no longer any interest therein to protect, and no standing to enjoin an infringement. He did not even exact from plaintiff any agreement to protect defendant’s exclusive right to enjoy the monopoly created by the patent, so that as soon as the assignment from Seligstein to plaintiff became operative the defendant was deprived by Seligstein’s act of the protection for which it had contracted. Seligstein, for the reasons stated, had incapacitated himself from protecting' the patent; plaintiff had assumed no obligation to do so, and defendant, holding only a partial license to manufacture and sell, but not to use, being a mere licensee, probably could not have protected itself (Gayler v. Wilder, 10 How. [U. S.] 477), and even if it could, that was not what it had contracted for, or what it was entitled to.
We are, therefore, of the opinion that by assigning the letters patent absolutely to plaintiff, Seligstein was guilty of a breach of his contract with defendant, concurring on this point with the learned trial justice who has enriched and fortified his opinion on this branch of the case by the citation of a number of pertinent authorities.
It is urged that defendant waived this breach by continuing to manufacture and sell the boxes and to pay royalties upon those sold after the breach had occurred. It is apparent that this argument cannot prevail, and this for two reasons. In the first place, one cannot be held to waive a breach of which he is ignorant, and it most clearly appears not only that defendant was, in fact, ignorant of the assignment from Seligstein to plaintiff, but also that both Seligstein and plaintiff took effective means to preserve defendant’s ignorance. In the second place, plaintiff’s complaint is based upon an allegation of full performance by Seligstein and plaintiff, and such an .allegation *612is not satisfied by proof of a breach by plaintiff and a waiver by defendant. Defendant’s payment of royalties, even if it had known of the assignment of the letters patent by Seligstein, woiild not in any event have been a waiver of the breach, since it would have been bound and could have been compelled to pay so much even if it had been an infringer and had no license at all. (Burdell v. Denig, 92 U. S. 720; Tilghman v. Proctor, 125 id. 143.)
It is immaterial that the jury seems to have found, reading their verdict in the light of the court’s charge, that there was no substantial infringement of the patent, although the evidence to the contrary is very persuasive and practically uncontradicted. The point is not that Seligstein failed to protect the patent, to defendant’s damage, but that he incapacitated himself from protecting it and thereby committed a breach. Whether or not damage resulted from such a breach is not material to the defense, though it would be if defendant were affirmatively suing for such damages.
What has already been said is sufficient to indicate our concurrence with the action of the trial court and our dissent from the conclusion reached by the Appellate Term.
There are other reasons which have been strongly urged upon us and which are not without plausibility why the plaintiff cannot succeed.
One is that by assigning the letters patent to plaintiff absolutely, without limitation or restriction, and without exacting any protection for defendant’s exclusive contract, Seligstein made it possible for plaintiff to invade defendant’s territory, and that he thereby destroyed the exclusive feature of defendant’s license.
A second reason is that the contract between Seligstein and defendant was personal to the assignor, and, therefore, unassignable by him. If so, of course, plaintiff cannot sue on it. This last reason strikes us with much force. Not only is there conspicuously absent from the contract between Seligstein and defendant any provision for an assignment by either party, but the contract calls for services, in certain contingencies, to be performed by Seligstein. As was said in a somewhat similar case: “ There is no provision for an assignment by Light and Gray, *613the other parties to the contract. The absence of such a provision, or of the word ‘ assign,’ would not be fatal, if it appeared from the true construction of the contract that the parties contemplated that it might be assigned by Light and Gray. But the covenants in the warranty import personal and important liabilities on the part of the warrantors; and the defendant, in the absence of an agreement by it to that effect, cannot be compelled to substitute therein the plaintiff for Light and Gray. ” (Gray Engine Starter Co. v. Gray & Davis, 224 Fed. Rep. 723.) The true rule is thus expressed in a well-known text book as follows.: “ Rights arising out of contract cannot be transferred if they are coupled with liabilities, or if they involve a relation of personal confidence such that the party whose agreement conferred those rights must have intended them to be exercised only by him in whom he actually confided.” (Pollock Contr. [4th ed.] 425.) Or, as was said by the Supreme Court of the United States, “ Everyone has a right to select and determine with whom he will contract, and cannot have another person thrust upon him without his consent.” (Arkansas Smelting Co. v. Belden Co., 127 U. S. 387.) The nature of the contract between Seligstein and defendant was such that it was or might be of great importance to defendant that the patent should be protected from infringement. It was willing to rely upon Seligstein for such protection, but it by no means followed that it would be or should be required to be equally well satisfied with any person responsible or irresponsible to whom Seligstein might without defendant’s consent assign the contract. It follows that the determination of the Appellate Term must be reversed and the order of the City Court affirmed, with costs to the appellant in all courts.
Clarke, P. J., McLaughlin and Page, JJ., concurred; Smith, J., dissented.