Patents by Inventor Frank E. Mastro

Frank E. Mastro 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).

  • Ocular plethysmograph
    Patent number: 4141346
    Abstract: An improved ocular plethysmograph for use in conjunction with known pulse volume recorders, and offering increased performance and simplicity as well as lower cost of manufacture. The device employs a means whereby a large DC pressure signal is cancelled across a very sensitive DC pressure transducer employed to detect directly the tiny pressure fluctuations resulting from minute volume plethysmic changes of the human ocular globe. The means employed provides secondary advantages in use.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: February 27, 1979
    Assignee: Life Sciences, Inc.
    Inventors: Robert C. Dean, Jr., Paul A. Hoisington, Brian F. Walsh, Frank E. Mastro