Granted Patent
Utility
US 5,122,819 · App. 07/777,507
Exposure device for color CRT manufacture and a compound corrective lens therefor
Inventor:
Kiyohiko Sato
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Oct 18, 1991
Inventor
Kiyohiko Sato
Assignee (at issue)
MITSUBISHI ELECTRIC 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.