Granted Patent
Utility
US 4,182,121 · App. 05/857,491
Exhaust tuning for transverse automobile engine
Inventor:
John F. Hall
Patented Case
View Patent ↗
Granted: Jan 8, 1980
Filed: Dec 5, 1977
Inventor
John F. Hall
Assignee (at issue)
Chrysler Group 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.