Granted Patent
Utility
US 4,453,937 · App. 06/290,667
Drainage device with flow meter
Inventors:
Leonard D. Kurtz, Joseph LiCause
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Aug 5, 1981
Inventors
Leonard D. Kurtz
Joseph LiCause
Assignee (at issue)
Bioresearch, 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.