Granted Patent
Utility
US 5,400,830 · App. 07/974,638
Composite automotive exhaust pipe
Inventors:
Ernest D. Stiles, Dale L. Hartsock
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Nov 12, 1992
Inventors
Ernest D. Stiles
Dale L. Hartsock
Assignee (at issue)
Ford Motor Company
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.