KNIGHT, District Judge.
This suit is for the infringement of U. S. Patent No. 1,892,258, issued to I. G. Farbenindustrie Aktiengesellschaft, assignee of Hanns Ufer. The only question at issue here is whether by virtue of the provisions of Section 4887 of the U. S. Revised Statutes, U.S.C.A. Title 35, § 32, the patent is invalid.
The first paragraph of that section provides that no patent shall "be declared invalid by reason of its having been first patented...
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