Patents by Inventor Ichiro Yonenaga

Ichiro Yonenaga 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).

  • Silicon germanium crystal
    Patent number: 6498288
    Abstract: Provided is an SiGe crystal having an improved performance index and excellent machinability as a material constituting a thermoelectric element, neither degradation in characteristics nor cracking occurring during use. Crystal grains forming the crystal are 5×10−5 mm3 or more in size.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: December 24, 2002
    Assignee: Shin-Etsu Handotai Co., Ltd.
    Inventors: Takao Abe, Ichiro Yonenaga, Tetsuya Igarashi