Multiple porting loudspeaker systems
Patent 4549631 Issued on October 29, 1985. Estimated Expiration Date: 
October 24, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 24, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1969704 3688864 InventorAssigneeApplicationNo. 06/544466 filed on 10/24/1983US Classes:181/155, Reflector baffle181/156, Reflex baffle181/160, With resonant chamber181/199Speaker typeExaminersPrimary: Hix, L. T.Assistant: Brown, Brian W. Attorney, Agent or FirmInternational ClassH04R 1/28 (20060101)AbstractA loudspeaker system has an enclosure of rectangular cross section with a baffle dividing the interior into first and second subchambers. Each subchamber has a port tube coupling the subchamber to the region outside the enclosure. The dividing baffle carries a woofer.Other References
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