Granted Patent
Utility
US 5,061,639 · App. 07/446,773
Liquid dispenser accuracy verification method
Inventors:
Kaki R. Lung, John Fox, Alex Chanin
Patented Case
View Patent ↗
Granted: Oct 29, 1991
Filed: Dec 6, 1989
Inventors
Kaki R. Lung
John Fox
Alex Chanin
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.