Patents by Inventor Tatsuya Nakatsuka

Tatsuya Nakatsuka 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).

  • Publication number: 20190159547
    Abstract: A shoe, which is light and capable of improving cushioning properties and a thrust force occurring upon push off without sacrificing comfort to wear, has a simple structure and can be mass-produced. The shoe is provided with: a shoe body into which a foot is inserted; a hard plate which covers a necessary area on a bottom side of the shoe body in a length direction and is fixed to the bottom side of the shoe body only at a necessary location including a position of a front foot part; and cushion materials which are attached to both end parts of a ground contact side of the hard plate in the length direction.
    Type: Application
    Filed: December 8, 2017
    Publication date: May 30, 2019
    Inventor: Tatsuya NAKATSUKA
  • Patent number: 8549773
    Abstract: A running shoe stores the shock during landing as energy and releases the stored energy when kicking off the toe portion, thereby making running and walking more efficient. The running shoe includes a shoe main body 10 into which the foot is inserted and a plate spring 5 that is large enough to cover an entire length of the shoe main body 10, is attached to a lower portion of the shoe main body 10, and is closed at a heel end portion thereof. The plate spring 5 is attached to a lower surface of the shoe main body 10 at only a toe end-side of the shoe main body 10.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: October 8, 2013
    Inventor: Tatsuya Nakatsuka
  • Publication number: 20100269368
    Abstract: A running shoe stores the shock during landing as energy and releases the stored energy when kicking off the toe portion, thereby making running and walking more efficient. The running shoe includes a shoe main body 10 into which the foot is inserted and a plate spring 5 that is large enough to cover an entire length of the shoe main body 10, is attached to a lower portion of the shoe main body 10, and is closed at a heel end portion thereof. The plate spring 5 is attached to a lower surface of the shoe main body 10 at only a toe end-side of the shoe main body 10.
    Type: Application
    Filed: July 8, 2010
    Publication date: October 28, 2010
    Inventor: Tatsuya Nakatsuka