Singer Manufacturing Co. v. Better Service Sewing Machine Co.

THOMAS F. MURPHY, District Judge.

This is a motion for a preliminary injunction against infringement of a patent on a thread tensioning device for use in sewing machines. The patent was issued in 1938, is scheduled to expire within five months and has remained unadjudicated. Defendants distribute and sell a sewing machine manufactured in Japan and embodying the alleged infringing thread tensioning device:

In support of its application, plaintiff — in addition to relying upon the pleadings and depositions of a defendant — offers two affidavits of attorneys from plaintiff’s own patent department.…