Granted Patent
Utility
US 6,369,313 · App. 09/790,040
Method and apparatus for simulating a jam session and instructing a user in how to play the drums
Inventor:
John Devecka
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Feb 21, 2001
Inventor
John Devecka
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.