Granted Patent
Utility
US 6,788,789 · App. 10/295,548
Phase conversion surround circuitry
Inventor:
Kazuhito Otsuka
Patented Case
View Patent ↗
Granted: Sep 7, 2004
Filed: Nov 15, 2002
Inventor
Kazuhito Otsuka
Assignee (at issue)
Victor Company of Japan, 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.