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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 5165416 | Continuous blood pressure monitoring system having a digital cuff calibration system and method A calibration system for a continuous blood pressure monitoring system using a tonometric sensor for continuously detecting a pulse wave comprises a digital cuff adapted to be placed around a digit of the patient for applying a calibration pressure to the... | 11/24/1992 |
| 5140991 | Heartbeat synchronous pulse wave detecting apparatus An apparatus for detecting a pulse wave produced from a subject in synchronous relationship with heartbeats of the subject, including a probe device for sensing a heartbeat synchronous pulse wave transmitted thereto and generating a signal representative ... | 08/25/1992 |
| 4973940 | Optimum impedance system for coupling transceiver to power line carrier network A method and apparatus for efficiently coupling a transceiver to an AC power line transmission system. The preferred embodiment of the coupling system comprises a line coupling network and first and second filter ports. The first filter port is connected ... | 11/27/1990 |
| 4936851 | Analytic bone implant A analytic bone implant includes a cylindrical housing with an inner chamber designed for collecting sample of bone tissues. The outer surface of the housing is provided with a plurality of threads for securing the implant into bone tissue. The housing is... | 06/26/1990 |
| 4903324 | Ring around transceiver The communications system of the present invention defines a complete feedback path consisting of first and second transceivers and an appropriate signal path. Each transceiver comprises a detector and a signal source capable of generating a signal at one... | 02/20/1990 |
| 4899760 | Noise rejecting detector for biomedical signals An improved biological signal detector which is extremely sensitive, yet resistant to the effects of high frequency noise. A multiplexed signal representation of a plurality biological signals is demultiplexed by a detector circuit comprising a plurality ... | 02/13/1990 |
| 4893631 | Active element selection for continuous blood pressure monitor transducer A method for monitoring a transducer array of individual pressure or force sensitive elements and for selecting the element within the array which most tracks the actual pulse waveform in an underlying artery, thus providing the most accurate measurement ... | 01/16/1990 |
| 4784154 | Interference resistant biomedical transducer An interference resistant biomedical transducer for monitoring the acoustic output of a patient's cardiac or respiratory system which provides a high degree of rejection of acoustic noise and spurious electromagnetic signals. The transducer comprises a pi... | 11/15/1988 |
| 4779626 | Method and apparatus for compensating for transducer position in blood pressure monitoring system A method and apparatus for ensuring accurate measurement of blood pressure regardless of the position of the sensing transducer relative to the position of the patient's heart. The method and apparatus provides a hydrostatic balancing system in which a co... | 10/25/1988 |
