Granted Patent
Utility
US 5,009,177 · App. 07/410,789
Thread cutting unit having a rotatably driveable cutting knife and loop spreading plate for a sewing machine
Inventors:
Shuichi Sato, Yoshimi Koguchi, Yoshiharu Kobayashi
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Sep 22, 1989
Inventors
Shuichi Sato
Yoshimi Koguchi
Yoshiharu Kobayashi
Assignee (at issue)
SSMC Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.