Granted Patent
Utility
US 5,147,609 · App. 07/354,026
Assay element
Inventor:
Gerd Grenner
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: May 19, 1989
Inventor
Gerd Grenner
Assignee (at issue)
PB Diagnostic Systems, 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.