Implantable microstimulator
Patent 5324316 Issued on June 28, 1994. Estimated Expiration Date: 
March 3, 2013. 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 3, 2013. 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 3357434 3646940 3667477 3727616 3842841 3870051 Implantable unipolar pacemaker with improved outer electrode plate Tissue growth control apparatus and method Identification device Bone growth stimulator InventorsAssigneeApplicationNo. 025889 filed on 03/03/1993US Classes:607/61, Energy source outside generator body607/72Pulse signalExaminersPrimary: Kamm, William E.Attorney, Agent or FirmInternational ClassA61N 001/36AbstractAn addressable, implantable microstimulator is substantially encapsulated within a hermetically-sealed housing inert to body fluids, and of a size and shape capable of implantation in a living body, by expulsion through a hypodermic needle. Power and information for operating the microstimulator is received through a modulated, alternating magnetic field in which a coil is adapted to function as the secondary winding of a transformer. Electrical energy is stored in capacitor means and is released into the living body by controlled, stimulating pulses which pass through body fluids and tissue between the exposed electrodes of the microstimulator. Detection and decoding means within the microstimulator are provided for controlling the stimulating pulses in accordance with the modulation of the received, alternating magnetic field. Means for controllably recharging the capacitor is provided.Other References
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