Patents Assigned to Taxmo Co., Ltd.
  • Diamond pen type marking device for substrates
    Patent number: 4954842
    Abstract: This invention relates to a pen type marking device whose marking pen tip is made of diamond and which is used for marking necessary for production control and quality control of substrates such as wafers.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: September 4, 1990
    Assignee: Taxmo Co., Ltd.
    Inventors: Isao Hashimoto, Tsuyoshi Hidehira