Granted Patent
Utility
US 6,357,987 · App. 09/473,764
Powered wheel chock with folding supports
Inventor:
Thomas J. Palus
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: Dec 29, 1999
Inventor
Thomas J. Palus
Assignee (at issue)
Kelley Company, 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.