Thomson Spot Welder Co. v. Oldberg Manfg. Co.

October 5, 1915, the United States circuit court of appeals, first circuit, in a suit in equity, for infringement of letters patent, No. 1,046,066, known as the Harmatta patent, held the patent valid. Thomson Electric Welding Co. v. Barney & Berry, 227 Fed. 428. January 30, 1317, plaintiff, owner of the patent, by written contract licensed defendant to operate spot and point welding machines under the patent, and defendant agreed to pay specified royalties quarterly. July 13, 1920, this suit was commenced to recover the royalties due up to that date. Defendant, under plea of the general…