Patents by Inventor Yuka Nagayama

Yuka Nagayama 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).

  • Headphone
    Patent number: D599780
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: September 8, 2009
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Yuka Nagayama
  • Earphone
    Patent number: D621389
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: August 10, 2010
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Yuka Nagayama, Hisaya Hagiwara
  • Earphone
    Patent number: D637585
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: May 10, 2011
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Yuka Nagayama, Reiko Kakusaka
  • Holder for cord for earphones and headphones
    Patent number: D639270
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: June 7, 2011
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Yuka Nagayama, Reiko Kakusaka