U.S. Circuit Court for the District of Eastern Pennsylvania September 20, 1901, No. 35 (Daylight Prism Co. v. Marcus Prism Co.)

ARCHBAED, District Judge.1

The striking practical results obtained in the lighting of dark interiors by the use of the plaintiffs’ “daylight prism glass” are full proof of its utility, and are strongly persuasive of its novelty as well. This glass is manufactured by the complainants under patent No. 593,045, issued to George K.