Patents by Inventor J. Malvern Benjamin, Jr.

J. Malvern Benjamin, Jr. 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).

  • Apparatus for promoting blood circulation
    Patent number: 4077402
    Abstract: Apparatus for promoting blood circulation in a body part suffering from a circulation deficiency by inflating and deflating a pressure cuff applied to a patient's limb proximal to the affected body part so that the blood is forced into the affected body part. The apparatus is synchronized with the patient's heartbeat by way of an EKG pickup and automatically compensates for the blood transit time from the heart to the point of cuff application. The apparatus includes control means responsive to the sensing of the blood flow at a location distal to the cuff for achieving optimum blood circulation in the body part being treated.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: March 7, 1978
    Inventors: J. Malvern Benjamin, Jr., D. Ridgely Bolgiano, Carl R. McHenry
  • Photoplethysmographs
    Patent number: 4015595
    Abstract: A photoplethysmograph probe including a light source, a photo-sensitive cell and a light control film positioned in front of the light source and photo-sensitive cell for collimating the light emitted from the light source and reflected back to the photo-sensitive cell.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: April 5, 1977
    Inventor: J. Malvern Benjamin, Jr.