Granted Patent
Utility
US 6,720,708 · App. 09/755,895
Mechanical-to-acoustical transformer and multi-media flat film speaker
Inventor:
Lewis Athanas
Patented Case
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Granted: Apr 13, 2004
Filed: Jan 5, 2001
Inventor
Lewis Athanas
Assignee (at issue)
Lewis Athanas
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.