Granted Patent
Utility
US 4,438,646 · App. 06/232,937
Crankshaft journal surface gauge and kit thereof
Inventor:
C. John Saban
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Feb 9, 1981
Inventor
C. John Saban
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.