Granted Patent
Utility
US 4,397,643 · App. 06/259,886
Drainage collection device with disposable liner
Inventor:
Sharon A. Rygiel
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: May 4, 1981
Inventor
Sharon A. Rygiel
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.