Granted Patent
Utility
US 4,938,746 · App. 07/173,340
Novel nasogastric device
Inventors:
Robert Etheredge, John Charkoudian
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Mar 25, 1988
Inventors
Robert Etheredge
John Charkoudian
Assignee (at issue)
The Kendall Company LP
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.