Granted Patent
Utility
US 6,516,601 · App. 09/852,544
Magnetic bearing arrangement for an open-end spinning device
Inventor:
Norbert Coenen
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: May 10, 2001
Inventor
Norbert Coenen
Assignee (at issue)
W. Schlafhorst AG & Co.
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.