Patents by Inventor Norman A. Sanford

Norman A. Sanford 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).

  • Method for forming thin film passive light waveguide circuit
    Patent number: 4547262
    Abstract: A thin film passive integrated optical waveguide is formed in a lithium tantalate substrate by proton exchange in a benzoic acid bath. Annealing the substrate provides increased waveguide depth and stabilizes the refractive index. Optical components are formed by proton exchange of the masked substrate after formation of a planar waveguide.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: October 15, 1985
    Assignee: Sperry Corporation
    Inventors: William Spillman, Jr., Richard A. Soref, Norman A. Sanford