Patents by Inventor Yoshiyasu Yoshida

Yoshiyasu Yoshida 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).

  • Heat insulating insert for footwear
    Patent number: 4249319
    Abstract: A heat insulating insert for a footwear which comprises a base sheet having a shape conforming with that of the sole of an average human foot and a toe cover at the toe portion of the base sheet for embracing the toe of the human foot. Porous bags containing exothermic agent therein are provided on the inner surface of the top of the toe cover and the toe portion of the base sheet in opposing and spaced relationship to the exothermic agent bag on the inner surface of the top of the toe cover and also in a portion of the base sheet corresponding to the plantar arch of the human foot. The exothermic agent performs exothermic reaction with the open air.
    Type: Grant
    Filed: January 18, 1980
    Date of Patent: February 10, 1981
    Inventor: Yoshiyasu Yoshida