Granted Patent
Utility
US 6,744,902 · App. 10/193,948
Ported loudspeaker enclosure
Inventor:
Lucio Proni
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Jul 10, 2002
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.