Granted Patent
Utility
US 5,341,533 · App. 08/008,744
Modular ramp
Inventor:
Jack Seitz
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Jan 25, 1993
Inventor
Jack Seitz
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.