Granted Patent
Utility
US 6,781,933 · App. 09/210,752
Pseudo multi-channel stereo play-back
Inventor:
Satomi Shigaki
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Dec 15, 1998
Inventor
Satomi Shigaki
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.