Granted Patent
Utility
US 6,252,153 · App. 09/649,502
Song accompaniment system
Inventor:
Motoki Toyama
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: Aug 28, 2000
Inventor
Motoki Toyama
Assignee (at issue)
Konami 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.