Patents by Inventor Bruce P. Ekholm

Bruce P. Ekholm 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 noninvasive prediction of hematocrit
    Patent number: 5755226
    Abstract: A method and apparatus for the direct noninvasive prediction of hematocrit in mammalian blood using photoplethysmography techniques and data processing. The method and apparatus also include optional prediction of other analytes of interest: percent oxygen saturation of mammalian blood and methemoglobin of stored blood. The method and apparatus can be used for the immediate, periodic, or continuous noninvasive diagnosis or monitoring of hematocrit levels in mammalian patients without pain to the patient or exposure of the health care practitioner to the blood of the patient.
    Type: Grant
    Filed: September 10, 1996
    Date of Patent: May 26, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Hatim M. Carim, Orlin B. Knudson, Bruce P. Ekholm, David P. Erickson, William J. Kelliher, Jr., Michael J. Rude
  • Method and apparatus for noninvasive prediction of hematocrit
    Patent number: 5553615
    Abstract: A method and apparatus for the direct noninvasive prediction of hematocrit in mammalian blood using photoplethysmography techniques and data processing. The method and apparatus also include optional prediction of other analytes of interest: percent oxygen saturation of mammalian blood and methemoglobin of stored blood. The method and apparatus can be used for the immediate, periodic, or continuous noninvasive diagnosis or monitoring of hematocrit levels in mammalian patients without pain to the patient or exposure of the health care practitioner to the blood of the patient.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: September 10, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Hatim M. Carim, Orlin B. Knudson, Bruce P. Ekholm, David P. Erickson, William J. Kelliher, Jr., Michael J. Rude