Granted Patent
Utility
US 5,594,428 · App. 08/325,670
Combination security unit
Inventor:
John Peterson
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Oct 19, 1994
Inventor
John Peterson
Assignee (at issue)
Digital Security Controls Ltd.
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.