Patents by Inventor Yuan-Kuan Chen

Yuan-Kuan Chen 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).

  • Metal tubes for guardrail
    Patent number: 7017320
    Abstract: A guardrail comprises two parallel metal tubes each having two lengthwise bent ends each having a fastening member, two inner abutment mechanisms each having a lengthwise abutment member and a mating fastening member at either end engaged with the fastening member for securing each metal tube and the corresponding abutment mechanism together, and a protective board having either end urged against the abutment member and the bent ends, thereby securing the protective board between the abutment mechanisms. Further, a number of variations are possible.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: March 28, 2006
    Inventor: Yuan-Kuan Chen
  • Metal tubes for guardrail
    Publication number: 20050017232
    Abstract: A guardrail comprises two parallel metal tubes each having two lengthwise bent ends each having a fastening member, two inner abutment mechanisms each having a lengthwise abutment member and a mating fastening member at either end engaged with the fastening member for securing each metal tube and the corresponding abutment mechanism together, and a protective board having either end urged against the abutment member and the bent ends, thereby securing the protective board between the abutment mechanisms. Further, a number of variations are possible.
    Type: Application
    Filed: August 18, 2004
    Publication date: January 27, 2005
    Inventor: Yuan-Kuan Chen
  • Metal tubes for guardrail
    Patent number: 6796101
    Abstract: A guardrail comprises two parallel metal tubes each having two lengthwise bent ends each having a fastening member, two inner abutment mechanisms each having a lengthwise abutment member and a mating fastening member at either end engaged with the fastening member for securing each metal tube and the corresponding abutment mechanism together, and a protective board having either end urged against the abutment member and the bent ends, thereby securing the protective board between the abutment mechanisms. Further, a number of variations are possible.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: September 28, 2004
    Inventor: Yuan-Kuan Chen
  • Metal tubes for guardrail
    Publication number: 20040065045
    Abstract: A guardrail comprises two parallel metal tubes each having two lengthwise bent ends each having a fastening member, two inner abutment mechanisms each having a lengthwise abutment member and a mating fastening member at either end engaged with the fastening member for securing each metal tube and the corresponding abutment mechanism together, and a protective board having either end urged against the abutment member and the bent ends, thereby securing the protective board between the abutment mechanisms. Further, a number of variations are possible.
    Type: Application
    Filed: October 2, 2002
    Publication date: April 8, 2004
    Inventor: Yuan-Kuan Chen