BUFFINGTON, Circuit Judge.
In the court below the General Electric Company charged the De Forest Radio Company with the infringement of four patents. On final hearing that court held one of the patents valid and infringed and the other three invalid. By appropriate steps its so holding was brought before this court for review. Without entering into detail, we may say that, save as to patent No. 1,558,436, the reasoning, conclusion, and decree of the court below commend...
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