Granted Patent
Utility
US 4,668,359 · App. 06/861,677
Diagnostic strip
Inventors:
Stephen Postle, Peter J. Elton, David P. Gregory, Janice Butcher
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: May 9, 1986
Inventors
Stephen Postle
Peter J. Elton
David P. Gregory
Janice Butcher
Assignee (at issue)
Ciba-Geigy
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.