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).

  • Knock type writing instrument
    Patent number: 10576775
    Abstract: Provided is a knock type writing instrument provided with a simple mechanism allowing a stable fretting operation or the like. A knock type writing instrument 1 is provided with: a shaft cylinder 2; a refill 5 arranged inside the shaft cylinder 2; a spring 6 biasing the refill 5 backward; an operation part 20 pressed forward against a biasing force of the spring 6 in a knocking operation; and a main rotor 30, and is switchable between a writing state and a non-writing state with the knocking operation. The knock type writing instrument 1 is further provided with: a knock locking member 50 movable forward and backward inside the shaft cylinder 2 due to gravity; and a locking part 60 provided on a side of the shaft cylinder 2 and capable of being locked with the knock locking member 50. When a front end of the shaft cylinder 2 is directed upward, the knock locking member 50 moves backward to be locked with the locking part 60 to prevent forward movement of the operation part 20.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: March 3, 2020
    Assignee: Mitsubishi Pencil Company, Limited
    Inventors: Yoshiharu Namiki, Kazuhiko Furukawa, Yusuke Nakamura, Kazuhiko Takanashi, Atsushi Nakashima, Yoshihiro Manta
  • KNOCK TYPE WRITING INSTRUMENT
    Publication number: 20180333980
    Abstract: Provided is a knock type writing instrument provided with a simple mechanism allowing a stable fretting operation or the like. A knock type writing instrument 1 is provided with: a shaft cylinder 2; a refill 5 arranged inside the shaft cylinder 2; a spring 6 biasing the refill 5 backward; an operation part 20 pressed forward against a biasing force of the spring 6 in a knocking operation; and a main rotor 30, and is switchable between a writing state and a non-writing state with the knocking operation. The knock type writing instrument 1 is further provided with: a knock locking member 50 movable forward and backward inside the shaft cylinder 2 due to gravity; and a locking part 60 provided on a side of the shaft cylinder 2 and capable of being locked with the knock locking member 50. When a front end of the shaft cylinder 2 is directed upward, the knock locking member 50 moves backward to be locked with the locking part 60 to prevent forward movement of the operation part 20.
    Type: Application
    Filed: December 9, 2015
    Publication date: November 22, 2018
    Applicant: MITSUBISHI PENCIL COMPANY, LIMITED
    Inventors: Yoshiharu NAMIKI, Kazuhiko FURUKAWA, Yusuke NAKAMURA, Kazuhiko TAKANASHI, Atsushi NAKASHIMA, Yoshihiro MANTA
  • Pen
    Patent number: D558269
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: December 25, 2007
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Ballpoint pen
    Patent number: D483066
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: December 2, 2003
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Ballpoint pen
    Patent number: D483067
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: December 2, 2003
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Ball-point pen
    Patent number: D484536
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: December 30, 2003
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Cap for a pen
    Patent number: D484541
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: December 30, 2003
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D578161
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: October 7, 2008
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Correction pen
    Patent number: D496069
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: September 14, 2004
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Ballpoint pen
    Patent number: D497950
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: November 2, 2004
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D592246
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: May 12, 2009
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D597135
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: July 28, 2009
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D602528
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: October 20, 2009
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Kazuhiko Takanashi
  • Cap
    Patent number: D645084
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: September 13, 2011
    Assignee: Mitsubishi Pencil Company, Limited
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D647967
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: November 1, 2011
    Assignee: Mitsubishi Pencil Company, Limited
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D673610
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: January 1, 2013
    Assignee: Mitsubishi Pencil Company, Limited
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D685027
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: June 25, 2013
    Assignee: Mitsubishi Pencil Company, Limited
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D830462
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: October 9, 2018
    Assignee: MITSUBISHI PENCIL COMPANY, LIMITED
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D901586
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: November 10, 2020
    Assignee: MITSUBISHI PENCIL COMPANY, LIMITED
    Inventor: Kazuhiko Takanashi
  • Pen
    Patent number: D953424
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: May 31, 2022
    Assignee: MITSUBISHI PENCILCOMPANY, LIMITED
    Inventor: Kazuhiko Takanashi