Patents by Inventor Hans Bergvall

Hans Bergvall 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).

  • Display unit and method of preparing same
    Patent number: 6376009
    Abstract: A first compound is applied to the polymeric coating of the display unit and the polymeric coating is ground with the first compound to even out a surface of the polymer coating. A second compound is then applied to the polymeric coating and ground on the polymeric coating to form a protective coating on the polymeric coating with the second compound. The protective coating is cleaned and a first polishing compound is applied to an oscillating polishing machine to polish the protective coating with the first polishing compound. A second polishing compound is then applied on the polishing machine and the protective coating is polished with the second polishing compound to form a polishing surface coating on the protective coating so that the retro reflection is at least 11 candela/m2/lux.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: April 23, 2002
    Inventor: Hans Bergvall