Patents by Inventor Richard John Stewart

Richard John Stewart 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).

  • Electrical Plug Lock
    Publication number: 20140202219
    Abstract: The invention is a locking device for use with any electrical equipment or appliance or device having a cord and attached electrical plug, it encapsulates the plug end and is lockable such that the electrical device is disabled and can no longer be plugged into a power source. The invention includes a housing of two halves, hinged at one end, with the interior of the housing shaped and dimensioned to receive the electrical plug. The invention also includes a locking mechanism with two latches operable via a special key. The key has a shaft with two portions having differing widths and which are complementary to corresponding apertures in the latches. The invention is useful for controlling the use of electrical devices, for example, gaming consoles and television.
    Type: Application
    Filed: November 23, 2013
    Publication date: July 24, 2014
    Inventor: Richard John Stewart Bolland
  • Chain link with angularly disposed end portions
    Patent number: 6871486
    Abstract: A chain link has a substantially centrally located juncture section with a first eye portion integrally connected to one end of the juncture section and a second eye portion integrally connected to the opposite end of the juncture section. The eye portions extend longitudinally outwardly from opposite ends of the juncture section and are disposed at a substantial angle relative to each other at opposite ends of the link. Such link may be connected to contiguous links to form a segment of a chain, with all of the links in a segment of chain thus produced having substantially the same orientation when the chain is held straight.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: March 29, 2005
    Assignee: Columbia Steel Casting Co., Inc.
    Inventors: Michael D. Moehnke, Stephen P. Doan, Richard John Stewart, David Garnet John Conroy, Martin Charles Simpson, James Anthony Russell, Peter Alan Lude
  • Chain link with angularly disposed end portions
    Publication number: 20040139719
    Abstract: A chain link has a substantially centrally located juncture section with a first eye portion integrally connected to one end of the juncture section and a second eye portion integrally connected to the opposite end of the juncture section. The eye portions extend longitudinally outwardly from opposite ends of the juncture section and are disposed at a substantial angle relative to each other at opposite ends of the link. Such link may be connected to contiguous links to form a segment of a chain, with all of the links in a segment of chain thus produced having substantially the same orientation when the chain is held straight.
    Type: Application
    Filed: December 23, 2003
    Publication date: July 22, 2004
    Applicant: Columbia Steel Casting Co., Inc.
    Inventors: Michael D. Moehnke, Stephen P. Doan, Richard John Stewart, David Garnet John Conroy, Martin Charles Simpson, James Anthony Russell, Peter Alan Lude