Patents by Inventor Hsien-Chao Wu

Hsien-Chao Wu 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: 5242519
    Abstract: A process for manufacturing a foamed laminate, which has a plurality of colors, alternating ridges and ridge-confined grooves, includes the steps of (a) superimposing an upper foamed plate having colored stripes, on a lower foamed plate having a single color; (b) pressing the upper and lower foamed plates using an upper and a lower press die to form a laminate, each of the press dies having ridges and ridge-confined grooves; (c) cutting off portions of the upper foamed plate formed at the ridges thereof in order to expose the lower foamed plate; and (d) cutting projections at the lower foamed plate so as to make the lower foamed plate flat.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: September 7, 1993
    Inventor: Hsien-Chao Wu