Patents by Inventor C. Rex Welsh

C. Rex Welsh 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: 5978103
    Abstract: There is described an apparatus and method for acquiring a video image from a film transparency, the apparatus having an optical axis O and a source of light for illuminating the transparency, comprising a first diffuser on the optical axis positioned adjacent the source of light, at least one fresnel lens positioned on the optical axis and having a focal length f, the fresnel lens being spaced from the first diffuser by a predetermined distance d where d<f, a second diffuser positioned on the optical axis adjacent the fresnel lens, a transparent plate for supporting the transparency on the optical axis and positioned adjacent the second diffuser, and a video recorder positioned on the optical axis for acquiring a video image of the transparency.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: November 2, 1999
    Assignee: CRW Imaging Inc.
    Inventor: C. Rex Welsh