Patents by Inventor R. David McNaughton

R. David McNaughton 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).

  • Syringe shield
    Patent number: 5024660
    Abstract: Disclosed are hypodermic syringes having special safety features for preventing the user from inadvertently pricking himself with the needle. In the preferred embodiment the barrel of, for example, a syringe is provided with a sleeve that can be drawn out over the needle and firmly locked into position to prevent accidental contact of the user with the needle.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: June 18, 1991
    Inventor: R. David McNaughton
  • Syringe shield
    Patent number: 4874383
    Abstract: Disclosed are hypodermic syringes having special safety features for preventing the user from inadvertently pricking himself with the needle. In the preferred embodiment the barrel of, for example, a syringe is provided with a sleeve that can be drawn out over the needle and firmly locked into position to prevent accidental contact of the user with the needle.
    Type: Grant
    Filed: December 8, 1987
    Date of Patent: October 17, 1989
    Inventor: R. David McNaughton