Patents by Inventor Khalid Chehab

Khalid Chehab 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).

  • Hybrid refractive birefringent multifocal ophthalmic lenses
    Patent number: 6250757
    Abstract: The invention provides lenses incorporating both birefringent material and zones of more than one optical power, or focal length.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: June 26, 2001
    Assignee: Johnson & Johnson Vision Products, Inc.
    Inventors: Jeffrey H. Roffman, Khalid Chehab