Patents by Inventor Masanori Tsuchikura

Masanori Tsuchikura 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).

  • Pen
    Patent number: D504699
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: May 3, 2005
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Masanori Tsuchikura
  • Marking pen
    Patent number: D443642
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: June 12, 2001
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Masanori Tsuchikura
  • Ball-point pen
    Patent number: D451545
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: December 4, 2001
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Masanori Tsuchikura
  • Ball-point pen with a mechanical pencil
    Patent number: D453790
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: February 19, 2002
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Masanori Tsuchikura
  • Electric pencil sharpener
    Patent number: D454159
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: March 5, 2002
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Masanori Tsuchikura
  • Marker
    Patent number: D497641
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: October 26, 2004
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Masanori Tsuchikura