Granted Patent
Utility
US 6,751,337 · App. 10/229,382
Digital watermark detecting with weighting functions
Inventors:
Ahmed Tewfik, Mitchell D. Swanson, Bin Zhu
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Aug 26, 2002
Inventors
Ahmed Tewfik
Mitchell D. Swanson
Bin Zhu
Assignee (at issue)
Digimarc Corporation
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.