Patents by Inventor Ralph S. Evans

Ralph S. Evans 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).

  • Multi-position focusing apparatus
    Patent number: 4116539
    Abstract: A multi-position focusing apparatus having a plurality of pads mounted about a centerline receiving ray reflecting members or energy emitting devices thereon, whereby the pads are focused along the centerline on a desired point in space to concentrate all of the energy on the selected point and when once focused, upon operating the apparatus at substantially all positions of the pads, the focal point of the pads will lie in a common point along the centerline.
    Type: Grant
    Filed: September 20, 1977
    Date of Patent: September 26, 1978
    Inventor: Ralph S. Evans