Granted Patent
Utility
US 4,387,589 · App. 06/287,538
Test stand
Inventor:
Larry Larson
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Jun 10, 1981
Inventor
Larry Larson
Assignee (at issue)
Caterpillar Tractor Co.
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.