Granted Patent
Utility
US 5,734,734 · App. 08/580,764
Audio voice coil adaptor ring
Inventor:
Lucio Proni
Patented Case
View Patent ↗
Granted: Mar 31, 1998
Filed: Dec 29, 1995
Inventor
Lucio Proni
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.