Patents by Inventor Chang-Tung Huang

Chang-Tung Huang 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).

  • Lock barrel and a driving part for the same
    Patent number: 7353675
    Abstract: A lock barrel and a driving part for the same comprises a plurality of key channels for the insertion o the driving part (key) and a plurality of transverse gateways for housing movable parts, which will bulge into the key channels for making the channels effectively small and therefore shielding them from illegally intruded tools.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: April 8, 2008
    Inventors: Sheng-Ho Chao, Chang-Tung Huang
  • LOCK BARREL AND A DRIVING PART FOR THE SAME
    Publication number: 20080066508
    Abstract: A lock barrel and a driving part for the same comprises a plurality of key channels for the insertion o the driving part (key) and a plurality of transverse gateways for housing movable parts, which will bulge into the key channels for making the channels effectively small and therefore shielding them from illegally intruded tools.
    Type: Application
    Filed: September 18, 2006
    Publication date: March 20, 2008
    Inventors: Sheng-Ho Chao, Chang-Tung Huang