Granted Patent
Utility
US 6,272,634 · App. 08/918,126
Digital watermarking to resolve multiple claims of ownership
Inventors:
Ahmed Tewfik, Mitchell D. Swanson, Bin Zhu
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Aug 27, 1997
Inventors
Ahmed Tewfik
Mitchell D. Swanson
Bin Zhu
Assignee (at issue)
Regents of the University of Minnesota
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.