Granted Patent
Utility
US 5,808,568 · App. 08/823,134
Finger operated module for generating encoding signals
Inventor:
Chih-Hsiung Wu
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Mar 25, 1997
Inventor
Chih-Hsiung Wu
Assignee (at issue)
Primax Electronics 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.