Granted Patent
Utility
US 6,729,766 · App. 10/052,140
Retention of ceramic bearings
Inventor:
Mark Hall
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Jan 17, 2002
Inventor
Mark Hall
Assignee (at issue)
VESUVIUS CRUCIBLE COMPANY
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.