Granted Patent
Utility
US 4,816,704 · App. 07/040,878
Frequency-to-voltage converter
Inventor:
David Fiori, Jr.
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Apr 21, 1987
Inventor
David Fiori, Jr.
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.