Patents by Inventor Po W. Yuen

Po W. Yuen 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).

  • Postal mailer with calling card
    Patent number: 6976709
    Abstract: A postal mailer which comprises a postcard having in the front left top section a detachable calling card and having in the back surface left top, left bottom, right bottom and central sections map indicia designating the general area and specific location of the return address indicia on the postcard.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: December 20, 2005
    Inventor: Po W. Yuen
  • Security nut and key assembly
    Patent number: 6571588
    Abstract: A security nut and key assembly including an integral lock provided for quick release of a wheel on a bicycle frame or the like while providing anti-theft means adaptable to be programmed so that no two locks will have the same release mechanism.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: June 3, 2003
    Inventor: Po W. Yuen