Cellular phone with high-quality sound reproduction capability
Patent 6819939 Issued on November 16, 2004. Estimated Expiration Date: 
March 15, 2022. 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.
March 15, 2022. 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 ReferencesVehicular audio data file handling apparatus system and method Patent #: 6608993 InventorAssigneeApplicationNo. 10097404 filed on 03/15/2002US Classes:455/550.1, Radiotelephone equipment detail455/563, Having voice recognition or synthesization455/90.3, Having particular housing or support of a transceiver455/569.1, Hands-free or loudspeaking arrangement455/556.1, Integrated with other device455/575.1, Housing or support455/567, Call alerting381/163, Having bi-directional transducer381/309, Stereo earphone381/26, Stereo sound pickup device (microphone)704/200.1PsychoacousticExaminersPrimary: Chin, VivianAssistant: Dao, Minh D. Attorney, Agent or FirmForeign Patent References
International ClassH04B 138AbstractIn a cellular phone, stereophonic sound reproduction of music etc. is realized by using a microphone and a speaker of the cellular phone as stereophonic speakers. By the stereophonic sound reproduction function, radio broadcasting from FM stations, streaming sound from the Internet, etc. are reproduced by the cellular phone. The speaker and the microphone are removed from the front of the housing of the cellular phone (where a display and operation buttons are mounted) and are placed on the back of the housing, thereby the diameters of the speaker and the microphone are enlarged and thereby wide-range and high-volume-level sound reproduction is realized. The speaker and the microphone are preferably implemented by low-profile flat-panel speakers that are functionally equivalent. Further, by the removal of the speaker and microphone from the front of the housing, the sizes of the display and the operation buttons are enlarged, thereby the viewability of the display and the operability of the operation buttons are improved. Such features are effectively realized in, for example, a folding cellular phone that can be unfolded to an angle larger than 180°.Field of SearchRadiotelephone equipment detailHaving voice recognition or synthesization Having particular housing or support of a transceiver Hands-free or loudspeaking arrangement Integrated with other device Housing or support Call alerting Having bi-directional transducer Stereo sound pickup device (microphone) Stereo earphone Psychoacoustic | |
