Patents by Inventor Katalin Sallai

Katalin Sallai 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).

  • Patent number: 4940301
    Abstract: A method and apparatus for enhancing a holographic image in order to create an eerie spiritual visual image which can be used in conjunction with religious pictures in hologram form or an eerie visual image of decorative scenes for home or office furnishing purposes or Halloween or other scary situations. A holographic film incorporating an image therein is placed between two plates of optically transparent material such as glass. A direct source of illumination of the image through candlelight set at the focal point distance in front of the hologram film, within its focal plane and at a location no lower than the lowermost point of the holographic image creates the enhanced image and eerie effect in a dark room.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: July 10, 1990
    Inventor: Katalin Sallai