Patents by Inventor Neil Donaldson

Neil Donaldson 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 syringe
    Patent number: 5971964
    Abstract: A syringe system is providing including a body and a needle assembly including an elongated hollow shaft slidably positioned within the body. Also included is a plunger assembly for expelling fluid from within the body out through the shaft of the needle assembly and further for engaging the needle assembly upon abutment therewith. This allows withdrawal of the shaft of the needle assembly into the body. Next provided is a locking mechanism for precluding reinsertion of the shaft of the needle assembly exterior of the body.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: October 26, 1999
    Inventor: Neil Donaldson