Granted Patent
Utility
US 5,091,681 · App. 07/621,488
CRT dynamic focus system having independent corner adjustment
Inventor:
Leroy A. Sutton
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Nov 30, 1990
Inventor
Leroy A. Sutton
Assignee (at issue)
Zenith Electronics LLC
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.