Patents by Inventor Naohiro Hotta

Naohiro Hotta 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 and apparatus for electropolishing and grinding
    Patent number: 5032238
    Abstract: A method of electropolishing and grinding the both surfaces of a circular workpiece comprises polishing and grinding the both surfaces of a circular workpiece with a pair of grindingstones which are so arranged as to oppose the polishing/grinding surfaces, the body material of the polishing/grinding surface of the grindingstones being composed of an electric conductive material wherein the grindingstones are connected to the positive pole of a power source and an electrode located in the vicinity of the grindingstones is connected to the negative pole, and a voltage is applied across the positive and negative poles, whereby a dressing operation to the polishing/grinding surfaces is conducted by the electrolysis of the pair of grindingstones during the polishing and grinding operation.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: July 16, 1991
    Assignee: Asahi Glass Co., Ltd.
    Inventors: Kazuhiko Ishimura, Ikuo Nagasawa, Shigeru Muramoto, Naohiro Hotta