Acoustic signalling apparatus for implantable devices
Patent 4481950 Issued on November 13, 1984. Estimated Expiration Date: 
November 13, 2001. 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.
November 13, 2001. 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 3693627 System for detecting information in an artificial cardiac pacemaker Heart pacemaker monitor, alarm and auxiliary power supply Patent #: 4102346 InventorAssigneeApplicationNo. 06/250539 filed on 04/03/1981US Classes:607/29Testing condition of energy sourceExaminersPrimary: Kamm, William E.Attorney, Agent or FirmInternational ClassesA61N 1/362 (20060101)A61N 1/37 (20060101) AbstractAcoustic signalling apparatus is provided for use with implantable devices for therapeutic, diagnostic or other medical or scientific purposes, for implantation in living animal bodies, including human bodies. A piezoelectric element positioned adjacent the inside wall of the implantable device is selectively energized by an oscillator circuit operating from an energy storage capacitor. Switching devices are provided for activating the acoustic signal according to sensed medical conditions within the body, or according to operating conditions of the device itself, such as indicating approaching end of battery life. | |
