Patents Assigned to Frank Chang
  • Patent number: 7749116
    Abstract: The present invention provides a panel of the ball for ball game, said panel has the folding portion and the opposite folding portion on its periphery, which are opposite to each other and made of the same continuous material. The folding portion and the opposite folding portion of said leather panels have the good engaging property and difficult to separate with each other during usage because they are made of the same material. The panel has simple manufacturing process and low production cost, making the ball for ball game comprising above panels have good using properties, simple manufacturing process and low production cost.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: July 6, 2010
    Assignee: Frank Chang
    Inventors: Ya Fang Tang, Yuen Yuen Chang