Granted Patent
Utility
US 4,524,423 · App. 06/319,061
Digital signal separation filters
Inventor:
Alfonse A. Acampora
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Nov 6, 1981
Inventor
Alfonse A. Acampora
Assignee (at issue)
RCA 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.