Heyer v. Duplicator Manufacturing Co.

This is a bill in equity brought by the respondent against the petitioner alleging the infringement of a patent. The District Court dismissed the bill, but the Circuit Court of Appeals gave the respondent a decree, one Judge dissenting upon the main point. 284 Fed. 242. The respondent owns a patent for improvements in multiple copying machines, one element of which is a band of gelatine to which is transferred the print to be multiplied and which yields copies up to about a hundred. This band is attached to a spool or spindle which fits into the machine. Anyone may make and sell the gelatine…