Granted Patent
Utility
US 6,512,796 · App. 09/082,395
Method and system for inserting and retrieving data in an audio signal
Inventor:
Douglas Sherwood
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: May 20, 1998
Inventor
Douglas Sherwood
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.