Granted Patent
Utility
US 5,934,857 · App. 08/754,810
Automatic wheel chock system
Inventor:
James C. Alexander
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Nov 21, 1996
Inventor
James C. Alexander
Assignee (at issue)
United Dominion IND, 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.