Patents by Inventor William Colin Barnett

William Colin Barnett 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).

  • Dispensing apparatus
    Patent number: 5645777
    Abstract: Apparatus for dispensing predetermined quantities of particulate material is disclosed which includes a casing defining a dispensing chamber and an inlet tube for delivering material to the chamber. The inlet tube extends into and is surrounded by the chamber. The chamber has an outlet for discharging material from the chamber. A mechanism is provided for effecting relative movement between the tube and the casing whereby to vary the volume of material introduced into the chamber on opening of an inlet valve.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: July 8, 1997
    Assignee: Royal Doulton (UK) Limited
    Inventors: David Kenneth Hulse, William Colin Barnett