Patents by Inventor Yongyao Yao

Yongyao Yao 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).

  • Emergently Openable Safe Door
    Publication number: 20120060726
    Abstract: An emergently openable safe door having a mechanic lock and an electronic lock. The mechanic lock has a shell and a cylindrical plug in the shell. The plug has a primary keyway for a primary key and an emergent keyway for an emergent key. The mechanic lock and an electric lock are able to respectively be opened with a primary key and enter cod normally and be opened with the primary key and a emergent key emergently when the electronic lock thereof malfunctions or an enter code thereof is forgotten.
    Type: Application
    Filed: May 21, 2010
    Publication date: March 15, 2012
    Applicant: NINGBO YONGFA GROUP CO., LTD.,
    Inventors: Yongyao Yao, Jun Hu, Zhongwei Cao