Granted Patent
Utility
US 4,475,898 · App. 06/371,756
Fetal ventriculo-amniotic shunt
Inventors:
Robert A. Brodner, Robert S. Bley, Ray H. Dormandy, Jr.
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Apr 26, 1982
Inventors
Robert A. Brodner
Robert S. Bley
Ray H. Dormandy, Jr.
Assignee (at issue)
American Hospital Supply Corp.
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.