Granted Patent
Utility
US 5,109,659 · App. 07/531,524
Magnetic ring for the spinning of textile yarn and method
Inventor:
Kiyohiro Tsuzuki
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Jun 1, 1990
Inventor
Kiyohiro Tsuzuki
Assignee (at issue)
TNS Mills 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.