BUFFINGTON, Circuit Judge.
This case involves the validity and infringement of certain claims of two patents. As to one, No. 959,563, granted May 31, 1910, to Levy and Helbronner for a method for the separation of gases, the finding of the court below was that it was devoid of invention, and further that it was "purely a paper patent, whose application remained long in the Patent Office. It has made no imprint upon the art. As I view it, it is a duplication of Linde...
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