Granted Patent
Utility
US 6,554,711 · App. 09/604,229
Music game machine with interactive second game device
Inventors:
Yasushi Kawasaki, Sadaharu Katori
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Jun 27, 2000
Inventors
Yasushi Kawasaki
Sadaharu Katori
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.