Granted Patent
Utility
US 5,889,396 · App. 08/737,445
Method and device for measuring the quantity of an active principle contained in a reservoir
Inventors:
Philippe Millot, Anne Liotard
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Oct 31, 1996
Inventors
Philippe Millot
Anne Liotard
Assignee (at issue)
Laboratories d'Hygiene et de Dietetique
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.