Patents by Inventor Sadayuki Ishiguro

Sadayuki Ishiguro 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 sub grooves in blocks, center main groove and subsidiary main grooves
    Patent number: 7958921
    Abstract: A pneumatic tire having a designated rotational direction is disclosed, wherein an entire area having a width 85% of a total tire width and a center area having a width 30% of the total tire width are defined in a tread portion. A center main groove is positioned on a tire equatorial line and extends in a tire circumferential direction. Subsidiary main grooves are positioned on two sides of the center main groove and extend in the tire circumferential direction. Angled and lateral grooves extend at an angle, in a direction opposite the rotational direction towards an outside in the tire width direction. Lateral grooves extend from each subsidiary main groove. Sub grooves extend from the lateral grooves towards the rotational direction. A total length of a block edge in the center area is from 40% to 60% of a total length of a block edge in the entire area.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: June 14, 2011
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Sadayuki Ishiguro, Kenichirou Endou
  • PNEUMATIC TIRE
    Publication number: 20110073230
    Abstract: A pneumatic tire having a designated rotational direction is disclosed, wherein an entire area having a width 85% of a total tire width and a center area having a width 30% of the total tire width are defined in a tread portion. A center main groove is positioned on a tire equatorial line and extends in a tire circumferential direction. Subsidiary main grooves are positioned on two sides of the center main groove and extend in the tire circumferential direction. Angled and lateral grooves extend at an angle, in a direction opposite the rotational direction towards an outside in the tire width direction. Lateral grooves extend from each subsidiary main groove. Sub grooves extend from the lateral grooves towards the rotational direction. A total length of a block edge in the center area is from 40% to 60% of a total length of a block edge in the entire area.
    Type: Application
    Filed: March 16, 2010
    Publication date: March 31, 2011
    Inventors: Sadayuki Ishiguro, Kenichirou Endou
  • Automobile tire
    Patent number: D775061
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: December 27, 2016
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Sadayuki Ishiguro, Takumi Morito