Patents by Inventor Chuan-Chen Luo

Chuan-Chen Luo 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).

  • Safety syringe
    Patent number: 5993419
    Abstract: A safety syringe includes a barrel having a front neck, a needle holder mounted in the front neck of the barrel to hold a needle unit outside the front neck of the barrel, the needle holder having a rear coupling hole, a plunger reciprocated in the barrel, and a coupling member connected to the plunger, the coupling member having a conical split head, which is forced into engagement with the rear coupling hole of the needle holder for enabling the needle holder and the needle unit to be carried backwards with the plunger and received inside the barrel after the use of the syringe.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: November 30, 1999
    Assignee: Pi-Chang Lo and Hui-Lin Tsao
    Inventors: Pi-Chang Lo, Chuan-Chen Luo