This is an action to recover royalties or license fees on twenty-eight hide-working machines. Under a written agreement dated January 10, 1.912, the plaintiff (which had previously acquired the right to do so from the owner of the patent) licensed the defendant to manufacture and sell the machines until December 12, 1928, unless the agreement should be earlier terminated in accordance with its provisions. The agreement provided that the defendant should render to the plaintiff quarterly returns showing the number of machines manufactured and sold by it, and on the first day of the month following the rendering of such returns should pay to the plaintiff the amount shown thereby to be due as license fees. It'also contained the following provision: “In the event that the licensee should fail to make the returns or pay the royalties or license fees in the manner and form as herein spécified, or should fail within any calendar year, commencing January 1, 1912, to pay royalties or license fees unto the Licensor for at least twenty (20) of said machines containing said patented inventions or improvements, said Licensor may terminate this license agreement by serving a thirty (30) days written notice of its intention so to do upon the Licensee, particularly specifying the breach, and if said Licensee shall not within said period of thirty (30) days_rectify such breach this contract and agreement shall be terminated upon the expiration of said thirty (30) days; but the Licensee shall not thereby be discharged from any liability to the Licensor for any royalties or license fees due the Licensor at the time of service of such notice.” The plaintiff contends that the foregoing clause was afterwards modified by the parties. It is plain that under the original agreement the defendant was required only to pay license fees on machines actually manufactured and sold by it.
The declaration in substance alleges that the plaintiff and the defendant after the original contract was made had a conversation with reference to the payment of unpaid license fees, in which
We are of opinion that the conversation was admissible. If believed, it shows that the parties modified the terms of the original contract and that the defendant agreed to pay license fees on a Tninimnm of twenty machines whether they were manufactured and sold or not. The parties, if they saw fit to do so, could change the original contract by a subsequent written instrument or by oral agreement. Bartlett v. Stanchfield, 148 Mass. 394. Ellis v. Block, 187 Mass. 408. Goodhue v. Hartford Fire Ins. Co. 175 Mass. 187.
The evidence of the oral agreement could not properly have been excluded either because not pleaded or on the ground that the contract had been reduced to writing by the parties.
If the jury had believed the testimony offered by the plaintiff and excluded by the judge, a final agreement was made that, in con
In view of the conclusion reached it is unnecessary to consider the other exceptions taken by the plaintiff to the exclusion of evidence.
As the exclusion of the evidence of the oral agreement was error, in accordance with the terms of the report, judgment must be entered for the plaintiff in the sum of $5,094.
So ordered.