Granted Patent
Utility
US 5,204,501 · App. 07/838,343
Synchronous common polar resonant wall type speaker cabinet
Inventor:
Ye-Ming Tsao
Patented Case
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Granted: Apr 20, 1993
Filed: Feb 20, 1992
Inventor
Ye-Ming Tsao
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.