Granted Patent
Utility
US 6,361,439 · App. 09/483,867
Game machine audio device and information recording medium
Inventor:
Yoshinori Kawamoto
Patented Case
View Patent ↗
Granted: Mar 26, 2002
Filed: Jan 18, 2000
Inventor
Yoshinori Kawamoto
Assignee (at issue)
Namco 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.