Granted Patent
Utility
US 6,416,014 · App. 09/770,365
Expandable core plug
Inventor:
Michael Van Deurse
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Jan 25, 2001
Inventor
Michael Van Deurse
Assignee (at issue)
DOUBLE E 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.