Granted Patent
Utility
US 6,352,521 · App. 09/399,615
Valve and sealing means for hemodialysis access device
Inventor:
Frank R. Prosl
Patented Case
View Patent ↗
Granted: Mar 5, 2002
Filed: Sep 20, 1999
Inventor
Frank R. Prosl
Assignee (at issue)
BIOLINK 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.