Patents by Inventor David A. Penner

David A. Penner 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).

  • Esophageal function and EKG monitor
    Patent number: 4503859
    Abstract: A monitoring system which records data relating to esophageal acidity fluctuations. The data is recorded on a miniature tape recorder and is then played back and converted to a visually perceptible format. The system has a unique interface circuit for converting the voltage difference between an esophageal probe and a reference electrode into a frequency modulated signal for recording. Another interface circuit reconverts the recorded frequency modulated signal into a voltage for a strip chart recorder. A multi-monitor embodiment is also disclosed which records data relating to esophageal spasms and heart activity in addition to esophageal acidity fluctuations.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: March 12, 1985
    Assignee: William Beaumont Hospital
    Inventors: Dale H. Petty, David A. Penner, James A. Van Den Berghe