Patents by Inventor Charles G. Reul

Charles G. Reul 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).

  • Patent number: 4239047
    Abstract: A Doppler scan is made of a person's blood vessels, a recording is made of the resulting plural-frequency sounds, and then successive aural sensings of selected frequency-range portions of that Doppler scan recording are made.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: December 16, 1980
    Assignee: William L. Griggs, III
    Inventors: William L. Griggs, III, Ernest E. Serrano, Dan Page, Charles G. Reul