MARTIN, Chief Justice.
This is an appeal from a decree of the Supreme Court of the District of Columbia in an equity suit, brought under section 4915, R. S. (35 USCA § 63), against the Commissioner of Patents, wherein appellants were denied letters patent for an alleged invention of an electric space-current device.
The application for the patent contained seven claims, of which the fourth has been withdrawn. All of the claims were denied by the Commissioner...
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