Granted Patent
Utility
US 5,368,556 · App. 08/207,890
Implantable drainage valve for the treatment of hydrocephalus
Inventor:
Alain Lecuyer
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Mar 7, 1994
Inventor
Alain Lecuyer
Assignee (at issue)
CORDIS CORPORATION
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.