The plaintiffs brought suit in the District Court under R.S. 4915, 35 U.S.C.A. § 63, seeking to obtain an adjudication that they are legally entitled to have a patent issue for an alleged invention in accordance with the claims in Etten application No. 648,409, filed December 22, 1932. Interference proceedings in the Patent Office between Etten, of The Chamberlain Corporation, and Kauffman, of Lovell...
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