Patents by Inventor David Mark Campbell

David Mark 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).

  • Tilt Hopper
    Publication number: 20160240033
    Abstract: A product retrieval mechanism for vending machines that permits collection of varying size products at a first level yet presents such products for collection at a raised height to make retrieval more convenient. The retrieval mechanism utilizes a movable floor within the hopper that movable between a lowered position and a higher position for presenting the product at a higher retrieval point relative to the floor upon opening of the hopper.
    Type: Application
    Filed: February 17, 2015
    Publication date: August 18, 2016
    Applicant: AUTOMATED MERCHANDISING SYSTEMS, INC.
    Inventors: Kenneth B. Tenney, David Mark Campbell, Michael Vincent Smith, Daniel W. Ahl, SR.