Patents by Inventor Hiroyuki Hamanaka

Hiroyuki Hamanaka 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).

  • Retainer for rubbery articles or the like
    Patent number: D318792
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: August 6, 1991
    Assignees: Nishikawa Rubber Company, Nifco Inc.
    Inventors: Hiroyuki Hamanaka, Noboru Obayashi