Granted Patent
Utility
US 6,722,574 · App. 09/947,475
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Inventors:
Kristofer Skantze, Jan Andersson
Patented Case
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Granted: Apr 20, 2004
Filed: Sep 7, 2001
Inventors
Kristofer Skantze
Jan Andersson
Assignee (at issue)
Anoto AB
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.