Patents by Inventor David John Francis Murphy

David John Francis Murphy 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).

  • Composting apparatus
    Patent number: 6047910
    Abstract: A composting assisting apparatus having a rotatable drum mounted on a support frame. A plurality of blades are mounted on the drum and arranged in a helical path along the axis of the drum. When the drum is rotated, the blades on the drum are rotated in a direction transverse to a forward direction of the support frame to engage, break up and aerate waste.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: April 11, 2000
    Assignee: Universal Greening Pty. Ltd.
    Inventor: David John Francis Murphy