Patents by Inventor David W. Box

David W. Box 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).

  • Product presenting different artistic images in the presence and absence of ambient light and fabrication method therefor
    Patent number: 5084309
    Abstract: The invention includes a product and a fabrication method for generating one image in the presence of ambient light and a second different image in the absence of ambient light. This invention can use phosphorescent material to form one of the images. This invention is particularly related to puzzles or novelty artwork for children.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: January 28, 1992
    Assignees: Timothy J. Martin, Russell C. Cline
    Inventors: Lou E. Smith, David W. Box
  • Device for warming food and beverage containers having support plate and perimeter skirt structure
    Patent number: 5073699
    Abstract: A warming unit for warming a vessel for containing food or beverages, such as a coffee pot for an automatic drip coffee maker, reduces scorching and burning resulting from non-uniform heating of the vessel. The warming device has a support plate with an upper surface dimensioned to support the vessel and a perimeter skirt extending downwardly from a perimeter of the support plate to surround a heating element beneath the support plate. The upper surface includes raised support structures formed as dome-shaped structures thereon. The cooking vessel rests on and is supported by the top surfaces of the support structures in spaced relation to the plate thus creating a convection space which reduces thermal conductive heating and allows both convection heating and infrared heating. The support plate also comprises a thermal mass sufficient to dampen fluxuations of temperature at the upper surface.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: December 17, 1991
    Assignee: V. Dardanella Austin
    Inventor: David W. Box
  • Thermal interface device for heating elements
    Patent number: 4825046
    Abstract: A thermal interface device is inserted between a heating element and a cooking vessel, such as a coffee pot for an automatic drip coffee maker, to reduce scorching and burning from non-uniform heating. The interface device has a main flat plate dimensioned correspondingly to the heating element and includes raised support structures formed as dome-shaped structures thereon. The cooking vessel rests on and is supported by the top surface of the support structures in spaced relation to the plate thus creating a convection space which reduces thermal conductive heating and allows both convection heating and infrared heating. An adhesive layer may be used to secure the interface device to the heating element, and vent holes either through the flat plate or through the dome-shaped structures vent stream and vapors from underneath the interface device when positioned on the heating element.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: April 25, 1989
    Inventor: David W. Box