Patents by Inventor Yuan-Tsai Yu

Yuan-Tsai Yu 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).

  • Portable stamp assembly
    Patent number: 7216586
    Abstract: A portable stamp assembly includes a cover composed of an upper cover and a lower cover pivotally connected to the upper cover. An ink receptacle is securely received in the lower cover and a plate having a pattern formed on a side thereof is pivotally connected to the upper cover. When the plate is at the first position, the plate is received in the first receiving space of the upper cover to have the pattern in constant engagement with ink inside the ink receptacle. When the plate is at the second position, the plate is connected to the lower cover so as to allow the upper cover, the lower cover and the plate to form a triangle.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: May 15, 2007
    Assignee: Megilo Co. Ltd
    Inventor: Yuan-Tsai Yu
  • Stamp assembly
    Patent number: D538329
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: March 13, 2007
    Assignee: Megilo Co., Ltd.
    Inventor: Yuan-Tsai Yu