Patents by Inventor Yelin Yin

Yelin Yin 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).

  • Extension ladder
    Patent number: D799063
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: October 3, 2017
    Assignee: EASYTEC CORPORATION
    Inventor: Yelin Yin
  • Ladder rung
    Patent number: D815756
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: April 17, 2018
    Assignee: EASYTEC CORPORATION
    Inventor: Yelin Yin
  • Buffering mechanism for an extension ladder
    Patent number: D829347
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: September 25, 2018
    Assignee: EASYTEC CORPORATION
    Inventor: Yelin Yin