Chambered headrest mounting for stereophonic loudspeakers
Patent 4638884 Issued on January 27, 1987. Estimated Expiration Date: 
July 11, 2005. 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.
July 11, 2005. 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 3512605 Speaker headrest for motor vehicles Stereophonic head rest Loudspeaker with rigid foamed back-cavity Multiple porting loudspeaker systems Patent #: 4549631 InventorAssigneeApplicationNo. 06/754496 filed on 07/11/1985US Classes:181/141, COMBINED181/146, With sound-asborbing means181/153, Rounded enclosure (e.g., curved, etc.)181/156, Reflex baffle381/346, Acoustic resistance381/354, Absorbing or attenuating element381/386, Mounting or support feature of housed loudspeaker381/388, With furniture, clothing, or image display381/86VEHICLEExaminersPrimary: Fuller, Benjamin R.Attorney, Agent or FirmInternational ClassH04R 5/02 (20060101)AbstractA headrest hollow casing has a central vented chamber connecting end chambers in which stereophonic loudspeakers are mounted and such central chamber is loosely filled with batting or other sound-damping material. The casing is supported by mounting rods or mounting bar angularly adjustable relative to the casing. | |
