Granted Patent
Utility
US 6,643,878 · App. 10/112,596
Loading ramp device which rolls up for convenient storage
Inventors:
Don Schmaltz, Joe Stanislao, Thomas Kenville
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Mar 27, 2002
Inventors
Don Schmaltz
Joe Stanislao
Thomas Kenville
Assignee (at issue)
DT&J, Inc.
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.