Granted Patent
Utility
US 5,306,240 · App. 08/007,245
Tunneler and method for implanting subcutaneous vascular access grafts
Inventor:
William Berry
Patented Case
View Patent ↗
Granted: Apr 26, 1994
Filed: Jan 21, 1993
Inventor
William Berry
Assignee (at issue)
Pilling 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.