Granted Patent
Utility
US 6,181,830 · App. 09/052,063
Image signal correction device
Inventor:
Koichi Sato
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Mar 31, 1998
Inventor
Koichi Sato
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.