Medical telemetry system using an implanted passive transponder
Patent 5626630 Issued on May 6, 1997. Estimated Expiration Date: 
October 13, 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.
October 13, 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 References 3576554 3724455 3798642 3898984 Harmonic communication system Transponders Implantable telemetry transmission system for analog and digital data Implant telemetry system Implant telemetry system Ambulatory monitoring system with real time analysis and telephone transmission InventorsAssigneeApplicationNo. 322852 filed on 10/13/1994US Classes:607/60, Telemetry or communications circuits128/903, RADIO TELEMETRY607/32Communicating with pacer (e.g., telemetry)ExaminersPrimary: Kamm, William E.Assistant: Layno, Carl H. International ClassA61N 001/36AbstractA telemetry system includes a remote monitoring station, a repeater worn externally by a patient and a quasi-passive transponder attached to a device implanted in the patient. The remote monitoring station communicates to the repeater to initiate an interrogation routine between the repeater and the transponder to extract patient condition information from the implanted device. When the repeater receives the condition information, it relays it to the remote monitoring station. The transponder is specially designed to operate with an extremely low level of power, less than 1 nW/baud, and to be compatible for attachment to existing implanted devices. The transponder can operate at a very high data rate, including a rate of about 100 kbps.Other References
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