Granted Patent
Utility
US 4,854,653 · App. 07/093,260
Multiple interlocking system for file cabinets, e.g.
Inventor:
Matthew L. Lakso
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Sep 4, 1987
Inventor
Matthew L. Lakso
Assignee (at issue)
Engineered Security Products Corporation
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.