Patents by Inventor Roy Sweeney

Roy Sweeney 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 positive vignetting
    Patent number: 4436400
    Abstract: The apparatus of the present invention is for use with a subject and a camera, including a lens and a shutter, for positive vignetting comprising a means adjacent the camera lens for at least partially obstructing subject light received by the camera lens in regions of the camera lens to be positive vignetted, a means for providing auxiliary light to the region adjacent the camera lens, and a means for directing a pattern of the auxiliary light to the camera lens in the regions of the camera lens to be positive vignetted. The method of the present invention is for use with a subject and a camera including a lens for providing positive vignetting comprising the steps of partially obstructing subject light from the camera lens in a region of the camera lens to be positive vignetted, and, introducing auxiliary light to the region to be positive vignetted.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: March 13, 1984
    Assignee: Phillip Stewart Charis
    Inventors: Phillip S. Charis, Roy Sweeney