Granted Patent
Utility
US 4,339,809 · App. 06/188,887
Noise protection circuits
Inventor:
Roger G. Stewart
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Sep 19, 1980
Inventor
Roger G. Stewart
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.