Granted Patent
Utility
US 4,804,921 · App. 07/089,360
Digital engine analyzer
Inventors:
Michael C. Putrow, Leonard Wisneski, Craig F. Govekar, Gary Jonker, Gordon Lindhard, Dennis W. Weidenbenner, Robert O. Quinn
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Oct 9, 1987
Inventors
Michael C. Putrow
Leonard Wisneski
Craig F. Govekar
Gary Jonker
Gordon Lindhard
Dennis W. Weidenbenner
Robert O. Quinn
Assignee (at issue)
Snap-on Tools 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.