Granted Patent
Utility
US 4,854,322 · App. 07/098,400
Capillary filtration and collection device for long-term monitoring of blood constituents
Inventors:
Stephen R. Ash, Elsa M. Janle-Swain
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Sep 18, 1987
Inventors
Stephen R. Ash
Elsa M. Janle-Swain
Assignee (at issue)
Ash Medical 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.