Granted Patent
Utility
US 5,116,227 · App. 07/663,425
Process for cleaning and enlarging passages
Inventor:
Guy Levy
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Mar 1, 1991
Inventor
Guy Levy
Assignee (at issue)
Endo Technic Corporation
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.