Granted Patent
Utility
US 4,331,980 · App. 06/185,097
Circuit and method for automatically setting the beam currents in a video camera
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Sep 8, 1980
Inventor
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.