Hussong Dyeing Mach. Co. v. Philadelphia Drying Machinery Co.

J. B. McPHERSON, District Judge.

The witness is a patent expert and was called by the complainant. Id is direct examination was confined to a description and explanation of the inventions in suit, a description of the defendants’ machines, and the expression of an opinion that these machines infringed the claims relied upon. His answer to the third question of this examination simply described the devices of the patents. On cross-examination he was asked for the first time whether he was acquainted with the British patent to Pollock, and to this he answered, “Yes.” Thereupon the…