Granted Patent
Utility
US 4,903,652 · App. 07/386,756
Cylinder liner insert and method of making engine block therewith
Inventors:
Nathanial L. Field, Benjamin P. Winter
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Jul 31, 1989
Inventors
Nathanial L. Field
Benjamin P. Winter
Assignee (at issue)
Ford Motor 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.