Granted Patent
Utility
US 4,963,325 · App. 07/191,158
Swab expressor immunoassay device
Inventors:
Donald J. Lennon, Paul B. Foster
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: May 6, 1988
Inventors
Donald J. Lennon
Paul B. Foster
Assignee (at issue)
Hygeia Sciences, 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.