Granted Patent
Utility
US 5,279,549 · App. 07/960,225
Closed ventilation and suction catheter system
Inventor:
Alan B. Ranford
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Oct 13, 1992
Inventor
Alan B. Ranford
Assignee (at issue)
Sherwood Medical 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.