Patents by Inventor Su-Ming Chang

Su-Ming Chang 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).

  • Retracting device for a safety syringe
    Publication number: 20050038385
    Abstract: A safety syringe has a barrel, a needle hub movably received in the barrel and having an annular shoulder formed on an inner periphery of the needle hub and a needle extending out from the needle hub. When a hook engages with the annular shoulder and the plunger is moving forward, the stop and the needle hub are free of engagement with one another and thus the needle is slanted relative to the plunger for destruction of the needle.
    Type: Application
    Filed: September 23, 2004
    Publication date: February 17, 2005
    Inventors: Ting Shen, Su-Ming Chang