Granted Patent
Utility
US 6,496,590 · App. 09/733,174
Loudspeaker with improved diaphragm
Inventor:
Lucio Proni
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: Dec 8, 2000
Inventor
Lucio Proni
Assignee (at issue)
JL Audio, Inc.
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.