Patents by Inventor Masanobu Murakosi

Masanobu Murakosi 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).

  • Method of adjusting hardness of metallic material
    Patent number: 4874437
    Abstract: A method of adjusting the hardness of a metallic material includes the steps of induction-tempering both of tough and hard portions which have been given a hardness required for the hard portion to a hardness required for the tough portion, induction-hardening the hard portion alone to a hardness higher than that required for the hard portion, and induction-tempering the hard portion alone to a hardness required for the hard portion.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: October 17, 1989
    Assignee: Kioritz Corporation
    Inventors: Yoshihiko Masuda, Masanobu Murakosi