Granted Patent
Utility
US 6,653,989 · App. 09/818,601
Composite display apparatus and head mounted display system using the same
Inventor:
Hiroyuki Nakanishi
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Mar 28, 2001
Inventor
Hiroyuki Nakanishi
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.