RUSSELL, Circuit Judge.
Other questions were involved and decided in the trial court, but the only issues presented by this appeal are restricted to that part of the trial court's finding and judgment that claim 2 of Ball patent, No. 2,114,013, was valid and infringed by the appellant's valve control. For many years dual control valve operators capable of operation by a handwheel situated on the valve, or automatically, by a motor, usually electric, operated by remote...
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