Granted Patent
Utility
US 4,868,430 · App. 07/154,768
Self-correcting digitally controlled timing circuit
Inventor:
John W. Stewart
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Feb 11, 1988
Inventor
John W. Stewart
Assignee (at issue)
NCR Corporation
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.