Patents by Inventor Hidekazu Nakazawa

Hidekazu Nakazawa 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).

  • Ball point pen
    Patent number: D506504
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: June 21, 2005
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Hidekazu Nakazawa, Naohiko Noto
  • Ball point pen
    Patent number: D506780
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: June 28, 2005
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Mechanical pencil
    Patent number: D523476
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: June 20, 2006
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Writing instrument
    Patent number: D538854
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: March 20, 2007
    Inventor: Hidekazu Nakazawa
  • Case for refillable leads for a mechanical pencil
    Patent number: D541869
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: May 1, 2007
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Writing instrument
    Patent number: D473898
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: April 29, 2003
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Ball point pen
    Patent number: D489404
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: May 4, 2004
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Cap for a writing instrument
    Patent number: D576678
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: September 9, 2008
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Ballpoint pen
    Patent number: D585936
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: February 3, 2009
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Mechanical pencil
    Patent number: D603897
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: November 10, 2009
    Assignee: Pentel Kabushika Kaisha
    Inventor: Hidekazu Nakazawa
  • Ballpoint pen
    Patent number: D648790
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: November 15, 2011
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Mechanical pencil
    Patent number: D724669
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 17, 2015
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Hidekazu Nakazawa, Shoto Yokoyama
  • Ballpoint pen
    Patent number: D822112
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: July 3, 2018
    Assignee: PENTEL KABUSHIKI KAISHA
    Inventor: Hidekazu Nakazawa
  • Ballpoint pen
    Patent number: D839348
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: January 29, 2019
    Assignee: PENTEL KABUSHIKI KAISHA
    Inventors: Hidekazu Nakazawa, Tomoaki Shibata
  • Mechanical pencil
    Patent number: D846640
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: April 23, 2019
    Assignee: PENTEL KABUSHIKI KAISHA
    Inventor: Hidekazu Nakazawa
  • Mechanical pencil
    Patent number: D876541
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: February 25, 2020
    Inventor: Hidekazu Nakazawa
  • Ballpoint pen
    Patent number: D902311
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: November 17, 2020
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Ballpoint pen
    Patent number: D956869
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: July 5, 2022
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Ballpoint pen
    Patent number: D956870
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: July 5, 2022
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa
  • Ballpoint pen
    Patent number: D978244
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: February 14, 2023
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hidekazu Nakazawa