Patents by Inventor Jeffrey Krall

Jeffrey Krall 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-FOCAL OPHTHALMIC LENS WITH BASE IN PRISM
    Publication number: 20060170863
    Abstract: A pair of glasses comprises a frame. A first progressive addition lens in the frame comprises a distance portion and a near portion. Diopter power and base in prism gradually increase from the distance portion to the near portion. A second progressive addition lens in the frame comprises a distance portion and a near portion. Diopter power and base in prism gradually increase from the distance portion to the near portion. Base in prism in the first lens may be different from in the second lens. Amount of base in prism may vary in a range of about 0 to 1.5 diopters.
    Type: Application
    Filed: March 10, 2005
    Publication date: August 3, 2006
    Inventor: Jeffrey Krall