Granted Patent
Utility
US 6,698,998 · App. 10/143,590
Foldable ramp
Inventor:
Dmitry Koretsky
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: May 8, 2002
Inventor
Dmitry Koretsky
Assignee (at issue)
Ricon Corp.
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.