Granted Patent
Utility
US 5,261,271 · App. 07/826,524
Exhaust backpressure tester
Inventors:
Robert F. Bihn, Freeman Carter Gates
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Jan 27, 1992
Inventors
Robert F. Bihn
Freeman Carter Gates
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.