Granted Patent
Utility
US 4,807,975 · App. 07/002,654
Image forming system having uniform illumination flux for liquid crystal image means
Inventor:
Masataka Negishi
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Dec 16, 1986
Inventor
Masataka Negishi
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.