Patents by Inventor Mark James Stone

Mark James Stone 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).

  • Patent number: 5775460
    Abstract: A hinge and a reconfigurable ladder having at least one pair of hinges is disclosed. The ladder has stile sections connected together by the hinges. The hinges consist of two hinge members mountable to ends of respective stile sections. A hinge cover extends over and receives the hinge members which are pivotally connected to the cover. The hinge members are linked to each other to control the pivotal movement of the hinge member so that they both pivot in unison and to the same extend relative to the cover. The hinge members have locating apertures. A locking mechanism is cooperable with the locating apertures for locking the hinge members in a desired relative position to one another.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: July 7, 1998
    Inventor: Mark James Stone