Patents by Inventor Prodromos Papavasiliou

Prodromos Papavasiliou 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).

  • Toy with thermochromic material
    Patent number: 5503583
    Abstract: A toy painted with paint containing thermochromic material which changes color as the temperature of the toy varies. Selected portions of the toy may be painted with the thermochromic material to provide a variety of patterns, designs, numbers, letters or other indicia which change color in response to temperature variations. In addition, different portions of the toy may be painted with different paints containing different colored thermochromic materials.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: April 2, 1996
    Assignee: Mattel, Inc.
    Inventors: Keith Hippely, Larry R. Wood, Jill E. Barad, Prodromos Papavasiliou