Granted Patent
Utility
US 4,305,050 · App. 06/071,246
Circuitry for generating reference signal for delta encoding systems
Inventor:
Richard E. DeFreitas
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Aug 30, 1979
Inventor
Richard E. DeFreitas
Assignee (at issue)
DeltaLab Research, Inc.
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.