Patents by Inventor Raleigh M. Davis

Raleigh M. Davis 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).

  • Filter frame and replaceable filter sheets
    Patent number: 5421862
    Abstract: The present invention entails a kit having comprised of a filter frame, at least one replaceable filter sheet, and fasteners for attaching the filter frame to an air return duct. The filter frame includes an air inlet side that includes a series of spot fasteners formed on the air inlet side wherein the fasteners serve to attach the filter sheet to the air inlet side of the filter frame. The filter sheet can be easily detached from the air inlet side of the filter frame and replaced by a fresh or new filter sheet.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: June 6, 1995
    Inventor: Raleigh M. Davis