Granted Patent
Utility
US 6,218,659 · App. 09/457,874
Dual layer optical ball for pointing device
Inventors:
Marc Bidiville, Eric Peter Raeber, Javier Arreguit, Harthmuth Buczek, Floris A. Van Shaik, Francois Bauduin, Denis O'Keeffe
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Dec 8, 1999
Inventors
Marc Bidiville
Eric Peter Raeber
Javier Arreguit
Harthmuth Buczek
Floris A. Van Shaik
Francois Bauduin
Denis O'Keeffe
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.