Granted Patent
Utility
US 6,181,842 · App. 09/480,342
Position digitizer waveguide array with integrated collimating optics
Inventors:
Daniel Francis, David Graham
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Jan 10, 2000
Inventors
Daniel Francis
David Graham
Assignee (at issue)
Poa Sana, 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.