Patents by Inventor William Asburry

William Asburry 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).

  • Multifinger photocell plethysmography system
    Patent number: 4183360
    Abstract: A photoplethysmographic instrument for simultaneous recordings of multifinger blood flow. The instrument consists of a plurality of suitably spaced and angled finger-receiving housings, each containing a photodetector, with respective light pipe bundles conducting light from a common source to the housings. The photodetectors respond to differences in light transmission through the patient's fingers inserted in the housings. The photodetectors are connected through respective preamplifiers to the respective inputs of a multichannel recorder, thereby providing recorded traces of the respective optical transmissions through the fingers. The photodetectors may also be connected to the respective inputs of a multichannel tape recorder, thereby providing magnetic tape recordings of the respective optical transmissions.
    Type: Grant
    Filed: July 26, 1978
    Date of Patent: January 15, 1980
    Assignee: The United States of America as represented by the Department of Health, Education and Welfare
    Inventors: Walter Carlson, Donald Wasserman, William Asburry