Patents by Inventor Carlton E. Duplan

Carlton E. Duplan 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).

  • Retractable needle system
    Patent number: 5722960
    Abstract: A retractable needle system for use with a medical device is described. The system uses a retractor which engages the well of a needle support means and retracts the needle support means containing the needle back into the cylindrical barrel of the medical device.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: March 3, 1998
    Assignee: Duplan Industries
    Inventors: Nancy Duplan, Carlton E. Duplan
  • Retractable needle for use with syringe
    Patent number: 5304150
    Abstract: A retractable needle is disclosed for use with a hypodermic syringe, in order to eliminate the possibility that a user could inadvertently contact a contaminated needle. The present needle comprises a hypodermic needle and needle support which can engage with the sealing portion of a commercially available hypodermic syringe plunger, allowing the needle to be withdrawn into the barrel of the syringe after use.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: April 19, 1994
    Assignee: Duplan Industries
    Inventors: Nancy Duplan, Carlton E. Duplan