Submarine communication
Patent 4203160 Issued on May 13, 1980. Estimated Expiration Date: 
May 13, 1997. 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.
May 13, 1997. 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 1320610 1425522 2164858 2395679 2431018 2838741 3092803 InventorApplicationNo. 04/079931 filed on 12/30/1960US Classes:367/2, TRANSPONDERS128/201.19, Means for transmitting, or facilitating, voice communication from face mask, hood, or helmet128/201.27, Diving or swimming apparatus128/204.23, Means for sensing condition of user's body367/132, Analog speech communication367/134, Telemetering367/6With plurality of transpondersExaminersPrimary: Farley, Richard A.Attorney, Agent or FirmInternational ClassesH04B 7/00 (20060101)H04B 11/00 (20060101) Abstract2. A method by which a submarine while deeply submerged in the sea may receive a message from a remote station without disclosing to others the position of the submarine, which comprises transmitting from said remote station into the atmosphere message information modulated on electromagnetic radiant energy, intercepting said radiant energy at a plurality of separated and widely dispersed relay stations on the surface of the sea, extracting the message information from the electromagnetic energy and transmitting acoustic wave energy modulated by said message information from each of said relay stations into the sea, locating said submerged submarine in message receiving range of one of said relay stations and detecting the acoustic wave energy modulated by the message information aboard said submarine.Other References
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