Granted Patent
Utility
US 6,179,545 · App. 09/433,986
Flip-over ramp
Inventors:
Lee B. Petersen, Jr., John C. Hall
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Nov 4, 1999
Inventors
Lee B. Petersen, Jr.
John C. Hall
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.