Granted Patent
Utility
US 4,946,449 · App. 06/943,014
Indwelling urethral catheter system and method
Inventor:
Richard C. Davis
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Dec 18, 1986
Inventor
Richard C. Davis
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.