Granted Patent
Utility
US 6,822,147 · App. 09/567,145
Arrangement of a sound hole and construction of a sound board in an acoustic guitar
Inventor:
Mathew A. McPherson
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: May 9, 2000
Inventor
Mathew A. McPherson
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.