Patents by Inventor Nadezda Blahna

Nadezda Blahna 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 of manufacturing correction filter for exposing screens of color-picture tubes
    Patent number: 4374866
    Abstract: To obtain the desired light-intensity distribution in lighthouses for exposing color-picture-tube screens, use is made of light filters. The filter disclosed is obtained by spraying droplets of an opaque paint onto a suitable transparent support.
    Type: Grant
    Filed: July 15, 1981
    Date of Patent: February 22, 1983
    Assignee: International Standard Electric Corporation
    Inventors: Nadezda Blahna, Bruno Fischer