Patents by Inventor Kazuyuki Hamamura

Kazuyuki Hamamura 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).

  • Reduced weight pneumatic tires
    Patent number: 6371183
    Abstract: A pneumatic tire comprises at least one carcass ply of textile cords and a belt comprised of two cross belt layers containing textile cords arranged at a cord inclination angle of 10-45° with respect to the equatorial plane, in which a difference of cord inclination angle between the two cross belt layers with respect to the equatorial plane of the tire is within a range of 5-35° in the widthwise direction, and is mounted onto at least either left-side or right-side front wheel of a four-wheeled vehicle.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: April 16, 2002
    Assignee: Bridgestone Corporation
    Inventors: Toru Ubukata, Kazuyuki Hamamura
  • Reduced weight pneumatic tires
    Patent number: 6260596
    Abstract: A pneumatic tire comprises at least one carcass ply of textile cords and a belt comprised of two cross belt layers containing textile cords arranged at a cord inclination angle of 10-45° with respect to the equatorial plane, in which a difference of cord inclination angle between the two cross belt layers with respect to the equatorial plane of the tire is within a range of 5-35° in the widthwise direction, and is mounted onto at least either left-side or right-side front wheel of a four-wheeled vehicle.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: July 17, 2001
    Assignee: Bridgestone Corporation
    Inventors: Toru Ubukata, Kazuyuki Hamamura