Granted Patent
Utility
US 6,801,630 · App. 09/138,463
Device for and method of mixing audio signals
Inventor:
Koichiro Shibata
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Aug 21, 1998
Inventor
Koichiro Shibata
Assignee (at issue)
YAMAHA 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.