Granted Patent
Utility
US 6,536,064 · App. 09/348,141
Folding ramp with pivotal leg support
Inventors:
Edward A. Swink, Clayton M. Smith, Carl L. Murphy, Rick Lavelock
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Jul 6, 1999
Inventors
Edward A. Swink
Clayton M. Smith
Carl L. Murphy
Rick Lavelock
Assignee (at issue)
ROM AG
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.