Granted Patent
Utility
US 6,829,360 · App. 09/743,615
Method and apparatus for expanding band of audio signal
Inventors:
Kazuya Iwata, Naoki Ejima, Akira Sobajima
Patented Case
View Patent ↗
Granted: Dec 7, 2004
Filed: Jan 12, 2001
Inventors
Kazuya Iwata
Naoki Ejima
Akira Sobajima
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.