Patents by Inventor Chang-Shou Tsai

Chang-Shou Tsai 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).

  • Musical instrument
    Patent number: D576664
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: September 9, 2008
    Assignee: AKT International Co., Ltd.
    Inventor: Chang-Shou Tsai
  • Ukulele
    Patent number: D628618
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: December 7, 2010
    Assignee: AKT International Co., Limited
    Inventor: Chang-Shou Tsai
  • Ukulele
    Patent number: D652069
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: January 10, 2012
    Assignee: Team International Music Co., Ltd.
    Inventor: Chang-Shou Tsai
  • Ukulele
    Patent number: D655330
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: March 6, 2012
    Assignee: Team International Music Co., Ltd.
    Inventor: Chang-Shou Tsai
  • Guitar
    Patent number: D665010
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: August 7, 2012
    Assignee: Team International Music Co., Ltd.
    Inventor: Chang-Shou Tsai