Patents by Inventor Tetsuo Yamada

Tetsuo Yamada 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 cooling steel wire
    Patent number: 3973426
    Abstract: A method for cooling a steel wire which is being drawn in a dry lubricant wire drawing operation wherein the rear portion of the die, including the backrelief portion thereof and the wire which has just been drawn to the desired dimension, are brought into direct contact with a cooling medium so as to effect forced cooling thereof, the wire thereby being cooled before the commencement of strain-aging embrittlement within the wire.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: August 10, 1976
    Assignee: Kobe Steel Limited
    Inventors: Tatsu Fujita, Heijiro Kawakami, Yoshiro Yamada, Tetsuo Yamada