Patents by Inventor Grant B. Merriman

Grant B. Merriman 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).

  • Locking system for hypodermic syringes
    Patent number: 5453092
    Abstract: A locking system for hypodermic syringes including a barrel and pistons where the barrel contains a plurality of detentes surrounding the piston in the "full in" position. A floating ring slides in a channel on the piston, restraining the detentes from engaging the piston head in the packaged position. In use the floating ring slides away from the piston head allowing the detentes to secure the piston in the "full in" position. Subsequent attempts to withdraw the piston will disengage the piston shaft form the piston.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: September 26, 1995
    Inventor: Grant B. Merriman