Granted Patent
Utility
US 4,853,969 · App. 07/195,428
Quantized digital filter
Inventor:
William E. Weideman
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: May 10, 1988
Inventor
William E. Weideman
Assignee (at issue)
Recognition Equipment Incorporated
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.