Granted Patent
Utility
US 5,004,696 · App. 07/172,682
Automatic total reducers monitoring and adjustment system
Inventor:
Jack L. Clinkenbeard
Patented Case
View Patent ↗
Granted: Apr 2, 1991
Filed: Mar 24, 1988
Inventor
Jack L. Clinkenbeard
Assignee (at issue)
Ashland Oil, Inc.
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.