Granted Patent
Utility
US 4,326,219 · App. 06/139,604
Digital error measuring circuit for shading and registration errors in television cameras
Inventor:
Karl H. Griesshaber
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Apr 11, 1980
Inventor
Karl H. Griesshaber
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.