Patents by Inventor Kazuhiko Takanashi

Kazuhiko Takanashi 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).

  • Patent number: 6428235
    Abstract: A writing implement having a cap member is provided and is a direct-flow type (liquid ink type) writing implement including: a barrel cylinder; a holder holding a pen core at a front end of the barrel cylinder and further having inside the barrel cylinder, an ink tank for storing a liquid ink and a collector for temporary retention thereof. The collector, barrel cylinder and ink tank are formed of a clear, transparent material. A mouthpiece at the outer periphery of the holder is formed of a resin material having the same color as the ink held in the ink tank or having the same color as the written ink. The barrel cylinder may have a partition wall, positioned near to the center, on the side (rear side) opposite to the position where the collector is arranged, forming an ink tank in a space inside the barrel between the rear end plate of the collector and the partition wall.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: August 6, 2002
    Assignee: Mitsubishi Pencil Kabushiki Kaisha
    Inventors: Kazuhiko Takanashi, Yoshiomi Konose
  • Patent number: D449649
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: October 23, 2001
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Patent number: D454158
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: March 5, 2002
    Assignee: The Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Patent number: D454588
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: March 19, 2002
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Patent number: D357699
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: April 25, 1995
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Patent number: D404426
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: January 19, 1999
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Patent number: D404427
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: January 19, 1999
    Assignee: Mitsubishi Pencil Co., Ltd
    Inventor: Kazuhiko Takanashi