Patents by Inventor Peter M. Chang

Peter M. Chang 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).

  • Core with foamed skin covering
    Patent number: 5503921
    Abstract: A bodyboard with skins covering the top and bottom surfaces of a foam plank that forms a core in the bodyboard. The top skin is prepared by heat-expanding a foamable matrix layer having a polyolefin film deposited on the top surface of the matrix layer. With the application of heat, the matrix layer becomes a foam, and the polyolefin film softens and integrates with the foam. Graphics carried internally on the film become an integral part of the foam.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: April 2, 1996
    Assignee: Kransco
    Inventors: Peter M. Chang, Steven M. Moran