CORNELY V. MARCKWALD, 131 U. S. 159 (1889)
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U.S. Supreme Court
Cornely v. Marckwald, 131 U.S. 159 (1889)
Cornely v. Marckwald
No. 293
Argued April 26, 1889
Decided May 13, 1889
131 U.S. 159
APPEAL FROM THE CIRCUIT COURT OF THE UNITED
STATES FOR THE SOUTHERN DISTRICT OF NEW YORK
Syllabus
The decision in Rude v. Westcott, 130 U. S. 152, affirmed that the payment of a sum in settlement of a claim for an alleged infringement of a patent cannot be taken as a standard to measure the value of the improvements patented in determining the damages sustained by the owner of the patent in other cases of infringement.
Where a plaintiff seeks to recover damages because he has been compelled to lower his prices to compete with an infringing defendant, he must show that his reduction in prices was due solely to the acts of the defendant or to what extent it was due to such acts.