Patents by Inventor Berthold Westhoff

Berthold Westhoff 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: 6667576
    Abstract: The effect lamp according to the invention comprises a baseplate, at least one perforated plate which is located in front of the baseplate and facing the observer and which comprises light passageway openings as well as at least one light source which illuminates the space between the baseplate and the perforated plate which is adjacent thereto and/or the space between two adjacent perforated plates. The baseplate and the perforated plate(s) bear text, image and/or color information whereby different optically appealing effects are generated. The optical effects alter depending on the illumination conditions inside and outside the effect lamp and depending on the location of the observer in relation to the effect lamp.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: December 23, 2003
    Inventor: Berthold Westhoff