Granted Patent
Utility
US 4,305,151 · App. 06/044,087
Digital discriminator for determining frequency error of an oscillator
Inventors:
Henry C. Johnson, Ronald W. Kipp
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: May 31, 1979
Inventors
Henry C. Johnson
Ronald W. Kipp
Assignee (at issue)
Sperry Corp.
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.