Granted Patent
Utility
US 5,171,316 · App. 07/657,081
Valvulotome
Inventor:
John T. Mehigan
Patented Case
View Patent ↗
Granted: Dec 15, 1992
Filed: Feb 19, 1991
Inventor
John T. Mehigan
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.