Granted Patent
Utility
US 6,687,057 · App. 09/628,662
Image display apparatus having rotationally asymmetric phase distribution
Inventor:
Shoichi Yamazaki
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Jul 28, 2000
Inventor
Shoichi Yamazaki
Assignee (at issue)
CANON 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.