Granted Patent
Utility
US 5,563,869 · App. 08/394,270
Prism has a plurality of reflective regions each with a predetermined phase difference
Inventors:
Hideyoshi Horimai, Katsuhiro Seo, Kimihiro Saito, Kiyoshi Toyota
Patented Case
View Patent ↗
Granted: Oct 8, 1996
Filed: Feb 24, 1995
Inventors
Hideyoshi Horimai
Katsuhiro Seo
Kimihiro Saito
Kiyoshi Toyota
Assignee (at issue)
SONY GROUP 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.