Granted Patent
Utility
US 5,427,949 · App. 08/197,371
Biosynthetic cerebrospinal fluid control
Inventor:
Kathryn D. Herring
Patented Case
View Patent ↗
Granted: Jun 27, 1995
Filed: Feb 16, 1994
Inventor
Kathryn D. Herring
Assignee (at issue)
Dade International, 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.