Patents by Inventor Kung Yuan Tong

Kung Yuan Tong 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).

  • Two in one pen with pencil graphite and refill ball pen
    Publication number: 20100209171
    Abstract: Two in one pen with pencil graphite and refill ball pen is a pen which has installed pencil graphite at one side and refill ball pen at the other. User can switch from pencil to ball pen at his/her wish in a second and vice versa to write.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 19, 2010
    Inventor: Kung Yuan Tong