Granted Patent
Utility
US 6,442,283 · App. 09/228,224
Multimedia data embedding
Inventors:
Ahmed Tewfik, Mitchell D. Swanson, Bin Zhu
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jan 11, 1999
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.