Granted Patent
Utility
US 5,043,625 · App. 07/438,384
Spherical aberration-corrected inline electron gun
Inventor:
Hsing-Yao Chen
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Nov 15, 1989
Inventor
Hsing-Yao Chen
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.