Patents by Inventor Joji Yatsunami

Joji Yatsunami 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).

  • Tires having an inner liner comprising a rubber composition and a coumarone resin
    Patent number: 5434212
    Abstract: A rubber composition for an inner liner comprises a coumarone resin and a member selected from the group consisting of natural rubber, synthetic rubber, a blend of natural rubber and synthetic rubber, and a blend of synthetic rubbers. The rubber composition for inner liner exhibits good shrinkage resistance and good inner pressure retaining property without deteriorating a running durability of a tire where the rubber composition is used as an inner liner.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: July 18, 1995
    Assignee: Bridgestone Corporation
    Inventors: Joji Yatsunami, Takuo Yasuda
  • Rubber composition for tread in high-speed running tires
    Patent number: 5132348
    Abstract: A tread rubber composition for high-speed running tires comprises a particular halogenated modified styrene-butadiene copolymer having p-halomethylbenzoyl group as a starting rubber and contains particular amounts of carbon black, process oil and diamine, and has excellent heat resistance and wear resistance.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: July 21, 1992
    Assignee: Bridgestone Corporation
    Inventors: Tadashi Saito, Joji Yatsunami, Ichiro Wada, Toshiki Takizawa
  • Pneumatic radial tire cord for belt
    Patent number: 4609024
    Abstract: A pneumatic radial tire comprising a radial carcass and a belt superimposed about a crown of the carcass is disclosed. In this tire, the cord for the belt is a metallic cord comprising a core of two metallic wires and an outer layer of six metallic wires disposed about the core, all of these wires having the same diameter and twisting direction and a form ratio of 90.about.110%.
    Type: Grant
    Filed: May 2, 1985
    Date of Patent: September 2, 1986
    Assignee: Bridgestone Corporation
    Inventors: Joji Yatsunami, Tamio Araki