Patents by Inventor Christian Zapf

Christian Zapf has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for automatic blood pressure monitoring
    Patent number: 5215096
    Abstract: A non-invasive automatic blood pressure monitor uses the oscillometric technique. That is, a cuff is inflated and then deflated in discrete deflation steps, while the oscillations caused by movement of the arterial walls are recorded during each deflation step. If no oscillations occur, the deflation step is interrupted when a predetermined time period (t.sub.max) has expired. According to the invention, said predetermined time period (t.sub.max) is varied according to the heart rate (step 13). This leads to considerable reduction of required time for each measurement.
    Type: Grant
    Filed: July 3, 1991
    Date of Patent: June 1, 1993
    Assignee: Hewlett Packard Company
    Inventors: Christian Zapf, Michael Frankenreiter