Granted Patent
Utility
US 4,820,490 · App. 07/075,844
Device and method for chemical analysis of fluids with a reagent coated light source
Inventor:
David Morris
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Jul 20, 1987
Inventor
David Morris
Assignee (at issue)
Miles 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.