Apnea monitoring system
Patent 4580575 Issued on April 8, 1986. Estimated Expiration Date: 
October 12, 2004. 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 12, 2004. 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 3572317 Respiration monitor Method and apparatus for locating the QRS portion of an electrocardiographic signal Heartbeat occurrence detector Respiration monitor and x-ray triggering apparatus Method and apparatus for detecting respiratory distress Cardiac arrhythmia analysis system Patent #: 4446868 InventorsAssigneeApplicationNo. 06/660458 filed on 10/12/1984US Classes:600/484, Detecting respiratory condition600/509, Detecting heartbeat electric signal600/519, Detecting signal repetition rate600/529, Respiratory600/536Detector responsive to movement induced variation in impedance of body to electric currentExaminersPrimary: Howell, Kyle L.Assistant: Hanley, John C. Attorney, Agent or FirmInternational ClassesA61B 5/08 (20060101)A61B 5/024 (20060101) A61B 5/0245 (20060101) AbstractApparatus for monitoring respiration and heartbeat and for processing electrical signals representative thereof, including circuits for developing a phase-shifted and amplitude-offset respiration signal for comparison with an original respiration signal for compensating for signal drift, and circuits for logically combining signals representative of the presence of respiration and heartbeat for eliminating certain false indications which may occur when only heartbeat exists. | |
