Patents by Inventor Fumiaki Fukasawa

Fumiaki Fukasawa 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).

  • Heavy duty pneumatic tires
    Patent number: 5180453
    Abstract: In a heavy duty pneumatic tire having a lug pattern and used for truck, bus, construction vehicle and the like, at least two lug grooves located in each half region of the tread portion are connected to each other through an auxiliary groove containing a step protrusion therein, and the widths and depths of the auxiliary groove and step protrusion satisfy particular relationships.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: January 19, 1993
    Assignee: Bridgestone Corporation
    Inventors: Fumiaki Fukasawa, Hiromichi Ikeda