Plaintiff entered into a contract with Western Union Oil Company on September 19, 1919, wherein plaintiff, as owner of a certain patented process known as the Armstrong Process, for the extraction and manufacture of high-grade gasoline from natural and casing-head gas, licensed Western Union Oil Company to use said Armstrong Process on certain premises leased by Western Union Oil Company in a plant or plants to be constructed and equipped on said leased premises and to treat therein natural gas or casing-head gas produced from the lands covered by said lease, or from lands adjoining thereto. Western Union Oil Company agreed to pay the entire cost of all labor and materials required in the construction and equipment of said plant, which was to be constructed under the supervision of the plaintiff in accordance with plans and specifications theretofore approved by Western Union Oil Company. The contract further provided as follows: “The party of the second part further agrees to pay to the party of the first part, at the offices of said first party in the city of Los Angeles, California, on the 10th day of each and every month from and after the commencement of the production of gasoline at said plant, and thereafter during the life of this agreement, for the right to use said Armstrong Process, a royalty of five per cent (5%) of the net amount of money received by the party of the second part during the preceding month from the sale of gasoline produced at said plant, which net amount shall be ascertained after deducting the cost of production, including the amount
Appellant argues that, since defendant gave notice to plaintiff refusing “to make any further payment as royalty or otherwise for said license or under said agreement, ” and declaring that it is “freed and discharged from any liability or obligation to make further payments as royalty or otherwise,” it is tantamount to an admission that if it had not been for the alleged invalidity of the patent it would not have been freed and discharged from such liability. We do not find in this notice any admission of an obligation to pay further royalties; nor .do we find that the fact that defendant stated that it was refusing “further payments as royalty or otherwise, . . . for the reason that the letters patent upon which you relied for your authority to grant such license are invalid and void,” prevented the defendant from availing itself of the contract and assignment defenses after litigation had begun. The doctrine that when a party gives a reason for his conduct and decision touching anything involved in a controversy he cannot, after litigation has begun, change his ground and put his
If the contract imposes no obligation to pay further royalties, then a discussion of the further defenses becomes superfluous. But as plaintiff insists that the contract does impose such obligation to pay further royalties, for the purpose of a complete consideration of the case we proceed to a discussion of the further defenses. Plaintiff contends that defendant having taken over operations under the contract and having held itself out to plaintiff as assuming the liabilities thereunder, it is liable to plaintiff and that the trial court erred in finding to the contrary. In reply thereto, defendant states that if the contract be construed as creating any obligation, defendant is not liable because it never assumed any of the obligations of the contract. The contract is by its terms made binding upon the assigns of the licensee. The mere assignment by the purchaser of its rights under an executory contract does not cast upon the assignee any of the personal liabilities imposed by the contract upon the assignor, even though the contract provides that its stipulations are to apply and bind the assigns of the respective parties, ■ unless the assignee expressly obligates himself to perform the covenants binding upon the assignor er recognizes his personal obligation to the vendor or claims
Appellant next contends that the trial court erred in overruling plaintiff’s motion to strike out all testimony, exhibits and proofs offered for the purpose of showing that plaintiff’s patent was invalid. It is a well-recognized rule of law that a licensee under a patent right cannot dispute the validity of his licensor’s patent. But an apparent exception to the rule of estoppel exists where the licensee repudiates the license. In Robinson on Patents, section 820, volume 2, it is said: “A licensee, having accepted a license, and while exercising under its protection the rights therein conferred, is estopped from denying the validity of the patent in any suit in which such exercise of his license privileges is the basis of the controversy. In the absence of express provisions in the license to the contrary, however, he may repudiate the license, cease to claim its protection, and as to his future exercise of the privileges described therein defend himself upon the ground that the patent is invalid.” In Universal Rim Co. v. Scott, 21 Fed. (2d) 346, the court said: “A licensee under a patent, who has manufactured an article pursuant to a license agreement and has regularly paid royalties during a number of years, is thereafter estopped to set up as a defense to a demand for payment of royalties that the article as made was not within the claims of the
It should be noted that the contract in suit does not contain any recital or clause admitting the validity of the patent, nor any stipulation not to contest the validity thereof; but, on the contrary, contains a guaranty of the validity by the plaintiff. That a licensee who has renounced the license may defend on the ground of invalidity of the patent is recognized in the following cases: Brown v. Lapham, 27 Fed. 77 ; Mudgett v. Thomas, 55 Fed. 645 , 647; Martin v. New Trinidad Lake Asphalt Co., 255 Fed. 93 , 94; Schutte & Koerting Co. v. Wheeler Condenser & E. Co., 295 Fed. 158 , 162. In Martin v. New Trinidad Lake Asphalt Co., supra, the court said: ‘‘A licensee under a license agreement, such as that upon which this suit is based, when sued for royalties payable under the agreement, where the patent which is the subject-matter of the license, is apparently valid and in for.ee (where it has not been declared invalid by a court of competent jurisdiction or revoked by the Patent Office before the royalties have accrued), may not set up the
Finally, appellant contends that the evidence is insufficient to show that plaintiff’s patent was invalid. No good purpose would be served by reviewing the evidence submitted on the question of the validity of the patent. Suffice it to say that, in our opinion, the evidence submitted is sufficient to support the findings of the trial court.
For the reasons stated the judgment is affirmed,
I concur in the conclusion reached by reason of the first part of said opinion wherein it states that there was no further liability under the terms of the written contract.
I dissent from the judgment.
A petition for a rehearing of this cause was denied by the District Court of Appeal on May 31, 1929, and a petition by appellant to have the cause heard in the Supreme Court, after judgment in the District Court of Appeal, was denied by the Supreme Court on July 11, 1929.
All the Justices present concurred.
Cases cited
- Lisenby v. Newton 120 Cal. 571 p. 776
- Tarpey v. Curran 67 Cal. App. 575 at 587 p. 776, p. 778
- Barberich v. Pooshichian 59 Cal. App. 507 p. 776
- Robinson v. Rispin 33 Cal. App. 536 p. 776
- Jones v. Allert 161 Cal. 234 p. 776
- Drips v. Moore 179 Cal. 249 p. 776
- Wilson v. Beazley 186 Cal. 437 p. 776
- Chung Kee v. Davidson 73 Cal. 522 p. 777
- Buckley v. Gray 110 Cal. 339 p. 777
- Wilson v. Shea 29 Cal. App. 788 p. 777
- Ericksen v. Rhee 181 Cal. 562 p. 777
- Stone v. Owens 105 Cal. 292 p. 778
- Canale v. Copello 137 Cal. 22 p. 778
- Beazley v. Embree 41 Cal. App. 706 p. 778
- Bryant v. Smith 57 Cal. App. 214 p. 778
- Skinner v. Walter A. Wood Mowing & Reaping Machine Co. 140 N. Y. 217 p. 779, p. 781
- Pope Manufacturing Co. v. Gormully 36 L. Ed. 414 p. 780
- Teets v. Village of Middletown 106 N. Y. 651 p. 781
- Dale Tile Manufacturing Co. v. Hyatt 31 L. Ed. 683 p. 781
- Marston v. Swett 82 N. Y. 526 p. 781
- United States v. Harvey Steel Co. 196 U. S. 310 p. 782