I am aware of some opinions from this circuit which advise against going on to test validity, once the Court finds non-infringement. R. H. Baker & Co. v. Smith-Blair, Inc., 331 F.2d 506, 507 (9th Cir. 1964); Bacon American Corp. v. Super Mold Corp. of Cal., 229 F.Supp. 998, 1007 (N.D.Cal.1964). However, the opinion of Judge Duniway in Lockwood v. Langendorf United Bakeries, Inc., 324 F.2d 82, 91 (9th Cir. 1963) is helpful: