Patents by Inventor Eric Long-Chia Chang

Eric Long-Chia Chang 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: 7188818
    Abstract: A portable easel comprises an easelback and palette box joined by two lockable hinges mounted on opposing sides, the hinges having friction washers, and having knobs extending outward from shafts of each hinge, the shafts defining a rotational axis. With knobs loosened, the easelback may be rotated to a desired angle relative to the palette box, and, with knobs tightened, the friction washers lock the easelback into position. The easelback further comprises a canvas-holder having a vertically adjustable slidable lower support plate and a vertically extendable shaft, said shaft having a horizontal cross member configured with rotatable hooks for securing a canvas. The palette box further comprises a right-angle baseplate for tripod connection to advantageously place the opened easel's center of gravity at the baseplate-to-tripod connection. The easelback may comprise slots for storing canvases, and the palette box may be configured with multiple compartments for storing paints and accessories.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: March 13, 2007
    Inventor: Eric Long-Chia Chang
  • Publication number: 20040031900
    Abstract: A portable easel comprises an easelback and palette box joined by two lockable hinges mounted on opposing sides, the hinges having friction washers, and having knobs extending outward from shafts of each hinge, the shafts defining a rotational axis. With knobs loosened, the easelback may be rotated to a desired angle relative to the palette box, and, with knobs tightened, the friction washers lock the easelback into position. The easelback further comprises a canvas-holder having a vertically adjustable slidable lower support plate and a vertically extendable shaft, said shaft having a horizontal cross member configured with rotatable hooks for securing a canvas. The palette box further comprises a right-angle baseplate for tripod connection to advantageously place the opened easel's center of gravity at the baseplate-to-tripod connection. The easelback may comprise slots for storing canvases, and the palette box may be configured with multiple compartments for storing paints and accessories.
    Type: Application
    Filed: March 28, 2003
    Publication date: February 19, 2004
    Inventor: Eric Long-Chia Chang