Patents by Inventor Chen-Shin Chu

Chen-Shin Chu 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).

  • Game ball
    Patent number: 4367873
    Abstract: A game ball for use in playing such games as baseball or softball comprises a spherical core made of PVC foam, a core cover of an ethylene copolymer, the core cover having a corrugated or rough surface, yarn windings and an outer leather cover, the ball having lower production cost and good durability in addition to essentially the same playing characteristics as conventional balls.
    Type: Grant
    Filed: June 30, 1981
    Date of Patent: January 11, 1983
    Inventors: Paul P. H. Chang, Chen-Shin Chu