Granted Patent
Utility
US 4,728,144 · App. 06/921,369
Trailer construction
Inventor:
John C. Crean
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Oct 20, 1986
Inventor
John C. Crean
Assignee (at issue)
Fleetwood Enterprises, 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.