Patents by Inventor Masanao Shiina

Masanao Shiina 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).

  • Writing instrument
    Patent number: D512458
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: December 6, 2005
    Assignee: Zebra Co., Ltd.
    Inventor: Masanao Shiina
  • Ballpoint pen
    Patent number: D566177
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: April 8, 2008
    Assignee: Zebra Co., Ltd
    Inventors: Masanao Shiina, Keiko Togawa
  • Ballpoint pen
    Patent number: D569430
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: May 20, 2008
    Assignee: Zebra Co., Ltd.
    Inventors: Masanao Shiina, Kosuke Kondo, Yoshitoshi Aizawa, Hiroyasu Okuo, Hiroaki Yamada, So Satoh, Kageyu Noro
  • Retractable pen
    Patent number: D616497
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: May 25, 2010
    Assignee: Zebra Co., Ltd.
    Inventor: Masanao Shiina
  • Ballpoint pen
    Patent number: D667882
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: September 25, 2012
    Assignee: Zebra Co., Ltd.
    Inventors: Ayana Uchiyama, Masanao Shiina