Patents by Inventor Yusufu Sulai

Yusufu Sulai 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).

  • Fresnel lens with flat apexes
    Patent number: 10712478
    Abstract: A Fresnel lens with truncated apexes includes a first lens surface that defines at least one portion of a Fresnel surface profile. The at least one portion of the Fresnel lens surface profile is defined by a plurality of truncated Fresnel structures. Each truncated Fresnel structure of the plurality of the truncated Fresnel structures corresponds to a respective slope facet, a respective draft facet and a respective flat apex surface located between the respective slope facet and the respective draft facet. Also disclosed are a method of making a Fresnel lens mold, and a method of making the Fresnel lens with truncated apexes using the Fresnel lens mold.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: July 14, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Jacques Gollier, Yusufu Sulai, Alexander Sohn