Patents Assigned to Hamamatsu Kenma Co., Ltd.
  • Patent number: 7052406
    Abstract: The present invention provides a bowling pin which exhibits the excellent durability while satisfying conditions required on the bowling pin such as a weight and a dry sound which is generated at the time of hitting. A hollow portion which extends in the vertical direction is formed in a core material which constitutes a bowling pin. Upper and lower end portions of the hollow portion are opened, wherein one cap is fitted into an opening and another cap is fitted into a lower-side opening. The whole of the core material and the cap are almost covered with a surface skin portion and a portion of the core material where the surface skin portion is not provided is formed of two line portions and a dial portion. The surface skin portion is white, the line portions are red and the dial portion is black.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: May 30, 2006
    Assignee: Hamamatsu Kenma Co., Ltd.
    Inventor: Nobufumi Suzuki
  • Publication number: 20040180727
    Abstract: The present invention provides a bowling pin which exhibits the excellent durability while satisfying conditions required on the bowling pin such as a weight and a dry sound which is generated at the time of hitting. A hollow portion which extends in the vertical direction is formed in a core material which constitutes a bowling pin. Upper and lower end portions of the hollow portion are opened, wherein one cap is fitted into an opening and another cap is fitted into a lower-side opening. The whole of the core material and the cap are almost covered with a surface skin portion and a portion of the core material where the surface skin portion is not provided is formed of two line portions and a dial portion. The surface skin portion is white, the line portions are red and the dial portion is black.
    Type: Application
    Filed: December 16, 2003
    Publication date: September 16, 2004
    Applicant: Hamamatsu Kenma Co., Ltd
    Inventor: Nobufumi Suzuki