TYLER, District Judge.
This is an action for declaratory judgment that United States Patent No. 2,837,626 issued on June 3, 1958 ("the Buck patent") is either invalid or not infringed by the operation and production of certain welding machines made and sold by plaintiffs.
The patent in suit relates to a method for producing spiral welded pipe or tubing. Plaintiffs have now moved for summary judgment upon the basic argument that...
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