Granted Patent
Utility
US 5,396,427 · App. 07/848,274
Method and apparatus for determining relative contributions of individual cylinders of internal combustion engine
Inventors:
James R. Piehl, Robert D. Braun, Gary S. Wollert, Craig F. Govekar
Patented Case
View Patent ↗
Granted: Mar 7, 1995
Filed: Mar 9, 1992
Inventors
James R. Piehl
Robert D. Braun
Gary S. Wollert
Craig F. Govekar
Assignee (at issue)
Snap-on Incorporated
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.