Patents by Inventor Wilbur H. Cash, Jr.

Wilbur H. Cash, 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).

  • Pulse transducer with artifact signal attenuator
    Patent number: 4198988
    Abstract: In combination with a pulse transducer characterized by a source of light and a detector for light reflected from blood vessels of a living body, to provide heart signal consisting of a modulated dc signal voltage indicative of the pulse rate for the body, an artifact signal resulting from a reflection of light from the skin of the body, which includes both a constant dc signal component and a modulated dc signal component the amplitude of which is greater and the frequency of which is less than said heart signal, a signal attenuator circuit including an operational amplifier for canceling said artifact signal from the output signal of the pulse transducer.
    Type: Grant
    Filed: July 26, 1978
    Date of Patent: April 22, 1980
    Inventors: Alan M. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Lovelace, Wilbur H. Cash, Jr., John T. Polhemus