BORAH, Circuit Judge.
Cameron Iron Works, Inc., the assignee of the Herbert Allen Letters Patent No. 2,606,740 for Improvement in Valves, brought this suit against Robert O. Stekoll, doing business as Speed-O-Valve Co., seeking injunctive relief and damages for an alleged infringement of Claims 1 and 4 of the Allen patent.
The patent in suit relates to an improvement in valves for controlling the flow of abrasive drilling mud...
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