Granted Patent
Utility
US 6,547,402 · App. 10/109,881
Projection lens shifting mechanism
Inventor:
Naoki Masuda
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Apr 1, 2002
Inventor
Naoki Masuda
Assignee (at issue)
NEC Viewtechnology, 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.