Patents by Inventor Richard Duk Wong Hahn

Richard Duk Wong Hahn 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: 6935641
    Abstract: The portable toolbox has a top, bottom, front and rear panels forming a box structure with opposing sides tilted off-vertical so as to converge upwardly. A plurality of hinged drawers and fixed bins are arranged on each side of the toolbox. The rear panel terminates at a pair of supporting feet for resting the apparatus on a supporting surface and a pair of wheels for moving the toolbox. By lifting the toolbox from its forward end, the toolbox moves from resting on its rear legs, to resting on its rear wheels. The top panel provides an upwardly facing work surface with a pair of hand holes separated by a hand grip for carrying the apparatus. A forward and a rearward sliding retractable work surface extender frames are positionable between a retracted position, secured within the box structure and an extended position directed outwardly from the box structure for resting a workpiece.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: August 30, 2005
    Inventor: Richard Duk Wong Hahn
  • Publication number: 20040195790
    Abstract: The portable toolbox has a top, bottom, front and rear panels forming a box structure with opposing sides tilted off-vertical so as to converge upwardly. A plurality of hinged drawers and fixed bins are arranged on each side of the toolbox. The rear panel terminates at a pair of supporting feet for resting the apparatus on a supporting surface and a pair of wheels for moving the toolbox. By lifting the toolbox from its forward end, the toolbox moves from resting on its rear legs, to resting on its rear wheels. The top panel provides an upwardly facing work surface with a pair of hand holes separated by a hand grip for carrying the apparatus. A forward and a rearward sliding retractable work surface extender frames are positionable between a retracted position, secured within the box structure and an extended position directed outwardly from the box structure for resting a workpiece.
    Type: Application
    Filed: April 3, 2003
    Publication date: October 7, 2004
    Inventor: Richard Duk Wong Hahn
  • Publication number: 20030115813
    Abstract: A plaster crown molding tile and a base support foundation beam provide mating nesting surfaces such that with the beam mounted to a wall surface, the tile may be placed securely onto the beam. A space is provided for a lighting fixture between the beam and the tile. Preferably, the nesting surfaces comprise orthogonal surfaces.
    Type: Application
    Filed: February 5, 2003
    Publication date: June 26, 2003
    Inventor: Richard Duk Wong Hahn
  • Publication number: 20030070373
    Abstract: A plaster crown molding tile system has an upright body portion providing a front decorative surface and a rear wall-engaging surface. Integral with the body portion, a topper portion extends angularly upwardly. A first tile provides a laterally extensive linear portion, the rear wall-engaging surface of the linear portion configured for surface-to-surface contact with a generally flat wall. The linear portion terminates at one end with an integral corner-turning portion which is small in lateral proportion to the linear portion. The rear wall-engaging surface of the corner-turning portion is oriented for contact with a second generally flat wall usually set at a right angle to the first wall. The corner-turning portion terminates laterally with a non-mitered first edge, laying in a plane generally perpendicular to the second generally flat wall wherein the first edge abuts a linear tile with a second edge conforming to the first edge for forming a uniformly tight butt seam.
    Type: Application
    Filed: November 22, 2002
    Publication date: April 17, 2003
    Inventor: Richard Duk Wong Hahn
  • Patent number: D489507
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: May 4, 2004
    Inventor: Richard Duk Wong Hahn