Patents by Inventor Michael John Firth

Michael John Firth 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).

  • Door identification system
    Patent number: 5897054
    Abstract: A new DOOR IDENTIFICATION SYSTEM for ALLOWING HOMEOWNERS TO RECEIVE AND VERIFY IDENTIFICATION FOR A PERSON KNOCKING ON THEIR DOOR. The inventive device includes an interior door sleeve positioned within a hole through a door. A sliding tray is slidably received within the interior door sleeve. The sliding tray includes an outwardly sliding portion and an inwardly sliding portion with a hinge disposed therebetween. A safety clip is secured to and extends upwardly from a front wall of the inwardly sliding portion of the sliding tray.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: April 27, 1999
    Inventor: Michael John Firth