Granted Patent
Utility
US 6,078,664 · App. 08/772,222
Z-transform implementation of digital watermarks
Inventors:
Scott A. Moskowitz, Marc Cooperman
Patented Case
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Granted: Jun 20, 2000
Filed: Dec 20, 1996
Inventors
Scott A. Moskowitz
Marc Cooperman
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.