Patents by Inventor Eric S. Hartwell

Eric S. Hartwell 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).

  • Animal separator
    Patent number: 4640231
    Abstract: An apparatus for separating animals according to their weight or other chosen characteristic comprises support means for allowing the animals to be examined one at a time, boundary means providing a barrier between a first collection region for animals selected as satisfying a particular chosen criterion and one or more second collection regions for the remaining animals, and drive means operative when necessary to move the support means and/or the boundary means to introduce or to allow the introduction of a selected animal into the appropriate collection region.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: February 3, 1987
    Assignee: National Research Development Corporation
    Inventors: Michael J. B. Turner, Michael Hanley, Eric S. Hartwell