Patents by Inventor Ronald E. Campbell

Ronald E. Campbell 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).

  • Ingestion monitoring system
    Patent number: 6463879
    Abstract: System apparatus for determining the volume of a potable liquid ingested by a small laboratory animal over an extended period of time is provided with a liquid dispensing section that has a liquid delivery tube and sipping tube combination, that retains a drop/droplet of the potable liquid in a position accessible to the animal, and that replaces each drop/droplet of liquid ingested by the animal with a succeeding drop/droplet of liquid, counting the total number of drops/droplets ingested by the animal over an extended period of time.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: October 15, 2002
    Inventors: Ronald E. Campbell, Michael G. Grigsby