Cellular telephone headset for hand-free communication
Patent 5613222 Issued on March 18, 1997. Estimated Expiration Date: 
June 6, 2014. 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.
June 6, 2014. 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 ReferencesInventorAssigneeApplicationNo. 254379 filed on 06/06/1994US Classes:455/575.2, Headgear379/430, Body supported (e.g., headgear)381/370, Headphone455/569.1Hands-free or loudspeaking arrangementExaminersPrimary: Eisenzopf, Reinhard J.Assistant: Le, Thanh Cong Attorney, Agent or FirmInternational ClassesH04B 001/38H04M 001/05 AbstractThis invention involves a headset for use with a cellular telephone. The headset comprises an acoustical earpiece assembly adapted for the acoustical transmission of sound to the ear, a device for mounting the earpiece assembly on the head in a position adjacent an ear of a person wearing the headset, and a flexible acoustical receiving tube having an upper end connected to the earpiece assembly and a lower end attached to an acoustical receiving cup. The headset also includes a device for releasably attaching the acoustical receiving cup to a telephone in a position where the mouth of the cup is disposed closely adjacent the telephone speaker for receiving sound emitting from the speaker. The acoustical cup transmits sound to the earpiece assembly via the acoustical receiving tube. The earpiece assembly has a transmitter mechanism for picking up sounds made by a person wearing the headset, and for transmitting such sounds to the transmitter of the telephone.Other References
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