Granted Patent
Utility
US 6,487,310 · App. 09/251,278
Signature matching
Inventors:
Christopher Bishop, Colin Windsor
Patented Case
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Granted: Nov 26, 2002
Filed: Feb 16, 1999
Inventors
Christopher Bishop
Colin Windsor
Assignee (at issue)
PenOp 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.