Granted Patent
Utility
US 6,775,416 · App. 09/602,229
System and method for inserting information in DCT coefficient domain
Inventor:
Masahiro Hashimoto
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Jun 23, 2000
Inventor
Masahiro Hashimoto
Assignee (at issue)
NEC 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.