Halliburton v. Independent Oil Well Cementing Co.

POLLOCK, District Judge.,The above suits are brought by plaintiffs to obtain decrees restraining infringement of letters patent Nos. 1,486,883 and 1,500,380; the latter patent being a combination patent, and a continuation of the former application for the patent first named, the same having been pending at the same time, the second patent being and covering the adaptation of the principles of the first to the cementing of oil wells by the use of certain specific appliances and apparatus employed in the doing of such useful work.

The defenses pleaded in the above eases are the same: .First,…