GALSTON, District Judge.
This is a patent infringement action, involving United States letters patent No. 1,388,434 and letters patent No. 1,435,306, the former for a method and apparatus for butt-welding thin-gage tubing, and the latter for butt-welded thin-walled tubing. Both patents have been sustained in this district and by the Circuit Court of Appeals. Elyria Iron & Steel Co. v. Mohegan Tube Co.,
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