Granted Patent
Utility
US 5,245,449 · App. 07/574,811
Polymer dispersed liquid crystal color projection display apparatus
Inventors:
Yoshiharu Ooi, Tomoki Gunjima
Patented Case
View Patent ↗
Granted: Sep 14, 1993
Filed: Aug 30, 1990
Inventors
Yoshiharu Ooi
Tomoki Gunjima
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.