Granted Patent
Utility
US 4,622,981 · App. 06/637,678
Drainage bag spacer and bag incorporating same
Inventor:
Paul Sherlock
Patented Case
View Patent ↗
Granted: Nov 18, 1986
Filed: Aug 3, 1984
Inventor
Paul Sherlock
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.