Patents by Inventor David A. Goldenberg

David A. Goldenberg 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: 4215373
    Abstract: A device for projecting and magnifying a picture image from a television set. A first housing is removably mounted to the television set to receive the picture image from the television screen. A second housing is slidably mounted to the first housing and cooperatively with the first housing forms a passage through which the picture image passes to a lens mounted at the end of the second housing. The first housing includes a light-absorbent inner surface whereas the second housing includes a light-reflective inner surface. A gear and rack device is provided for slidably adjusting the second housing relative to the first housing and controlling the ratio of the light-reflective surface to the light-absorbent surface. A barrel-configured lens is slidably mounted to the second housing for focusing of the picture image on a remotely located viewing surface which may be positioned at any one of a number of different distances from the television set and lens.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: July 29, 1980
    Inventors: Max Goldenberg, David A. Goldenberg