Patents by Inventor David Allan Witsoe

David Allan Witsoe 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).

  • Digital memory with power outage and memory overload logic in a dialysis system
    Patent number: 4098274
    Abstract: There is disclosed herein a blood pressure alarm system for use in a dialysis machine whereby alarms may be activated, and a blood pump deactivated if the actual blood pressure increases above or decreases below predetermined levels. The levels are determined by setting a particular blood pressure point and setting the amount by which the pressure can vary above and below the set point. A memory is provided for storing the set point and preventing variation of the set point with time. The dialysis machine and alarm system can malfunction under certain conditions and protection circuitry operates the alarms if a malfunction occurs.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: July 4, 1978
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventors: Wendell victor Ebling, David Allan Witsoe, Jan Soderstrom