Patents by Inventor Cheng-Tsai Tang

Cheng-Tsai Tang 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).

  • Publication number: 20050189905
    Abstract: A portable battery charging device in which the power plug base contains both a US specification plug and an EC specification plug, coupled by means of pivot posts and movably situated in the plug base. The two plugs can be individually or collectively rotated to lay flat or vertical. The conductive prongs and conductive pins extend through and protrude from the respective turn shafts as a first set of conductive tips and a second set of conductive tips. Two sets of conductive flexile elements are connected to a charging circuit board, the two sets of conductive flexile elements contacting the two sets of conductive tips. When the two sets of plugs are laid flat, the conductive tips are separated from the conductive flexile elements. Rotating either set to the vertical position causes the conductive tips of one set of lugs to be out of continuity with conductive flexile elements such that alternating current power from the other conductive prongs or pins is supplied to the charging circuit board.
    Type: Application
    Filed: February 17, 2004
    Publication date: September 1, 2005
    Inventors: Hui-Hu Liang, Cheng-Tsai Tang
  • Publication number: 20020043545
    Abstract: A holder for a portable electronic device such as a mobile phone comprising a carrier 1 with a neck strap 3 connected thereto. A microphone 5 and an earphone 4 and are electrically connectable to a mobile phone 6 or other portable electronic device by means of an electrical connector 22 provided on a connector 2 at the base of a pocket 12 in which the phone is located. The pocket 12 has a strap 11 extending therefrom with a clip 13 at one end with male connectors 14 thereon which cooperate with female connectors 21 on the connector part 2 to retain the phone 6 in the pocket 12.
    Type: Application
    Filed: February 27, 2001
    Publication date: April 18, 2002
    Inventor: Cheng-Tsai Tang