Patents by Inventor David A. Steffey

David A. Steffey 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).

  • Optic positioning device
    Patent number: 5195707
    Abstract: An optic positioning device for holding an optical element which has a center and for adjustng the optical element relative to its center. The optic positioning device includes a supporting base which has an upwardly facing concave spherical surface and a holding body for supporting the optical element. The holding body has a downwardly facing spherical surface which is slidably mounted on the concave spherical surface of the supporting base. The radial centers of the concave and convex spherical surfaces are at the center of the optical element.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: March 23, 1993
    Inventors: Wayne R. Ignatuk, David A. Steffey