This cause concerns letters patent No. 1,212,840, issued January 16, 1917, to Francis J. Straub, for an improved building block and methods of making the same. The question sought to be raised is really that of validity, although it is reached through the question of infringement. The patent has been twice before the Circuit Court of Appeals for this circuit. Straub v. Campbell, 259 F. 570; Crozier...
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