Aluminum Co. v. Sterling Products Corp.

VAN VALKENBURGH, Circuit Judge.

This suit involves five patents numbered and described as follows:

Letters patent No. 1,296,588 to J. H. Bamberg, Inventor, for “Metal Mold”; letters patent No. 1,296,589 to J. H. Bamberg, for “Casting and process of making same”; letters patent No. 3,296,500 to J. H. Bamberg, for “Metal Mold”; letters patent No. 3,296,591 to J. H. Bamberg, for “Piston Casting”; letters patent No. 3,296,595 to A. B. Norton, for “Process of making Castings.” Of these patents Nos. 3,296,588 and 1,296,500 are machine patents; No. 1,296,591 is a product patent; No. 3,296,595 is a…