Granted Patent
Utility
US 6,392,137 · App. 09/559,569
Polyphonic guitar pickup for sensing string vibrations in two mutually perpendicular planes
Inventor:
Osman K. Isvan
Patented Case
View Patent ↗
Granted: May 21, 2002
Filed: Apr 27, 2000
Inventor
Osman K. Isvan
Assignee (at issue)
Gibson Guitar Corp.
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.