Granted Patent
Utility
US 5,203,850 · App. 07/713,175
Air isolated fifth wheel system
Inventor:
David Harrold
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Jun 10, 1991
Inventor
David Harrold
Assignee (at issue)
Navistar International Transportation
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.