Granted Patent
Utility
US 6,437,318 · App. 09/243,922
Encoder using polarized filters
Inventors:
Olivier Egloff, Olivier Campiche
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Feb 3, 1999
Inventors
Olivier Egloff
Olivier Campiche
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.