Granted Patent
Utility
US 4,340,141 · App. 06/237,458
Unit dose drug control package
Inventor:
Arthur Fischer
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Feb 23, 1981
Inventor
Arthur Fischer
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.