Patents by Inventor Kazuyoshi Tagawa

Kazuyoshi Tagawa 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).

  • Pneumatic tire with tread having sipes and shallow grooves
    Patent number: 8020595
    Abstract: A plurality of shallow grooves which are shallower than a sipe are formed on land sections formed on treads of a pneumatic tire. The shallow grooves are configured so that a total sectional area of the shallow grooves per unit area in a cross section in a tire width direction in at least one of tread end areas arranged at end sides of the tread surface in the tire width direction or land end areas arranged at portions adjacent to a drain main groove on the land sections becomes larger than a total sectional area of the shallow grooves per unit on the other areas.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: September 20, 2011
    Assignee: Bridgestone Corporation
    Inventors: Yukihiro Kiwaki, Ryoichi Watabe, Kenichi Shibata, Kazuyoshi Tagawa
  • Pneumatic Tire
    Publication number: 20080135150
    Abstract: A plurality of shallow grooves which are shallower than a sipe are formed on land sections formed on treads of a pneumatic tire. The shallow grooves are configured so that a total sectional area of the shallow grooves per unit area in a cross section in a tire width direction in at least one of tread end areas arranged at end sides of the tread surface in the tire width direction or land end areas arranged at portions adjacent to a drain main groove on the land sections becomes larger than a total sectional area of the shallow grooves per unit on the other areas.
    Type: Application
    Filed: November 30, 2005
    Publication date: June 12, 2008
    Applicant: Bridgestone Corporation
    Inventors: Yukihiro Kiwaki, Ryoichi Watanabe, Kenichi Shibata, Kazuyoshi Tagawa
  • Steel cords for the reinforcement of rubber articles
    Patent number: 6182433
    Abstract: A steel cord for the reinforcement of rubber article having M parallel+N structure consists of a core of two steel filaments and a single sheath of seven or eight steel filaments, wherein diameters of core filament and sheath filament and twisting pitch have specified ranges, respectively.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: February 6, 2001
    Assignee: Bridgestone Corporation
    Inventor: Kazuyoshi Tagawa