Patents by Inventor Sachiko Tone

Sachiko Tone 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).

  • Ballpoint pen
    Patent number: D437352
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: February 6, 2001
    Assignee: Kokuyo Kabushiki Kaisha
    Inventors: Nobuki Matsuzaki, Sachiko Tone
  • Ballpoint pen
    Patent number: D449856
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: October 30, 2001
    Assignee: Kokuyo Kabushiki Kaisha
    Inventors: Nobuki Matsuzaki, Sachiko Tone
  • Mechanical pencil
    Patent number: D430607
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: September 5, 2000
    Assignee: Kokuyo Kabushiki Kaisha
    Inventors: Nobuki Matsuzaki, Sachiko Tone