Granted Patent
Utility
US 4,589,180 · App. 06/725,719
Tool for removal of an engine cylinder liner
Inventor:
Louis F. Vachon
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Apr 22, 1985
Inventor
Louis F. Vachon
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.