Granted Patent
Utility
US 4,842,450 · App. 07/253,467
Method and apparatus for self-adjusting boring bar
Inventors:
David A. Donovan, Nathaniel L. Field
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Oct 5, 1988
Inventors
David A. Donovan
Nathaniel L. Field
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.