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| Number | Title | Issue Date |
| 6097829 | Fiber-honeycomb-fiber sandwich speaker diaphragm and method A composite loudspeaker diaphragm is disclosed having first and second substantially flat carbon fiber skins, and a honeycomb core sandwiched between the first and second carbon skins. In a preferred form, each carbon fiber skin comprises a sheet formed o... | 08/01/2000 |
| 5701359 | Flat-panel speaker A composite loudspeaker diaphragm is disclosed having first and second substantially flat carbon fiber skins, and a honeycomb core sandwiched between the first and second carbon skins. In a preferred form, each carbon fiber skin comprises a sheet formed o... | 12/23/1997 |
