Patents by Inventor Sigeru Kawai

Sigeru Kawai 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).

  • Battery operated knife sharpener
    Patent number: D284736
    Type: Grant
    Filed: January 21, 1983
    Date of Patent: July 22, 1986
    Assignee: Kyusyu Hitachi Maxell, Ltd.
    Inventors: Sigeru Kawai, Masaru Komiya