Granted Patent
Utility
US 4,862,452 · App. 07/142,816
Digital signal processing system
Inventors:
A. David Milton, Jerry Stroobach
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Jan 11, 1988
Inventors
A. David Milton
Jerry Stroobach
Assignee (at issue)
Mitel 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.