Patents by Inventor John D. Roberts

John D. Roberts 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).

  • Fish food dispenser
    Patent number: 5003925
    Abstract: For the dispensing of preset quantities of flowable material, a dispenser comprised of a hollow casing with integral scoop and chute; whereby rotation of the casing causes material stored within to be passed from the scoop to the chute, either by tossing or by sliding on a ramp, where material is guided to a dispense port.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: April 2, 1991
    Inventor: John D. Roberts