Granted Patent
Utility
US 5,573,263 · App. 08/271,799
Automatic trailer hitch lock
Inventors:
Martin L. Denny, Alan Maddaford
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Jul 7, 1994
Inventors
Martin L. Denny
Alan Maddaford
Assignee (at issue)
DICO HOLDINGS LLC
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.