YANKWICH, District Judge.
This patent infringement suit relates to a patent to Oswald M. King, U. S. Letters Patent No. 2,701,235, issued February 1, 1955. The device is described as an "operating system for swimming pools" and infringement is claimed as to Claims 5, 7, 8 and 9. Of these Claim 7 is the most comprehensive and was used during the trial as a means of testing both validity and infringement. It is printed in the margin.
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