Granted Patent
Utility
US 5,247,138 · App. 07/789,665
Cordless digitizer stylus status encoding and transmission scheme
Inventor:
Waldo L. Landmeier
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Nov 8, 1991
Inventor
Waldo L. Landmeier
Assignee (at issue)
CalComp 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.