Granted Patent
Utility
US 4,881,191 · App. 07/003,158
Multichannel decimation/interpolation filter
Inventor:
Douglas Morton
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Jan 13, 1987
Inventor
Douglas Morton
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.