MR. CHIEF JUSTICE FULLER delivered the opinion of the court.
Albert Gräff and J.F. Donnell filed their bill in the Circuit Court of the United States for the Northern District of California against Emile Boesch and Martin Bauer, to recover for infringement of letters patent No. 289,571, for an improvement in lamp burners, granted on December 4, 1883, to Carl Schwintzer and Wilhelm. Gräff of Berlin, Germany, assignors of one-half to J.F. Donnell & Co...
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