FOSTER, Circuit Judge.
This is an appeal from an interlocutory decree holding that United States letters patent Nos. 1,379,224, 1,507,440, and 1,507,439, granted to Owen P. Smith for improvements in certain paraphernalia used for dog racing, were infringed by defendants, granting an injunction and referring the case to a master for an accounting.
The patents in suit and the infringing devices are fully described in the opinion of the District Court (
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