Granted Patent
Utility
US 6,833,862 · App. 09/345,167
Image sensor based vignetting correction
Inventor:
Wei Li
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Jun 30, 1999
Inventor
Wei Li
Assignee (at issue)
LOGITECH, INC.
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.