Granted Patent
Utility
US 6,325,477 · App. 09/004,513
Method and device for determining the quantity of product present in a reservoir, a product reservoir and a device for processing electrical signals intended for such a determination device
Inventors:
Pascal Coudray, Marie-Helene Froger
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Jan 8, 1998
Inventors
Pascal Coudray
Marie-Helene Froger
Assignee (at issue)
CANON KABUSHIKI KAISHA
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.