Granted Patent
Utility
US 4,249,202 · App. 06/037,345
Circuit for frequency selective coring of a video signal
Inventors:
Vinson R. Perry, John O. Ryan
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: May 9, 1979
Inventors
Vinson R. Perry
John O. Ryan
Assignee (at issue)
Ampex 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.