Granted Patent
Utility
US 4,415,802 · App. 06/461,478
Cross identification system and lock
Inventor:
George R. Long
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Jan 27, 1983
Inventor
George R. Long
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.