J. JOSEPH SMITH, Chief Judge.
This is an action for infringement of a Schuster U. S. patent No. 2,401,971 on a device called by plaintiff its "Accromatic" power chuck. The defenses are invalidity and noninfringement. Both plaintiff's device and the accused device of the defendant, an embodiment of Highberg patent No. 2,687,308, have as their principal advance over others in the art means for fine adjustment of individual jaws of a multi jaw power chuck to obtain precise...
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