Granted Patent
Utility
US 4,684,989 · App. 06/826,998
Signal background noise detector
Inventors:
Barbara J. Roeder, Leopold A. Harwood, Hermann J. Weckenbrock
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Feb 7, 1986
Inventors
Barbara J. Roeder
Leopold A. Harwood
Hermann J. Weckenbrock
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.