Granted Patent
Utility
US 4,800,875 · App. 07/087,423
Surgical funnel and method of using
Inventor:
Charles D. Ray
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Aug 20, 1987
Inventor
Charles D. Ray
Assignee (at issue)
Cedar Surgical, Inc.
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.