Patents by Inventor Chung Yin Ronald Mak

Chung Yin Ronald Mak 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).

  • Letter opener
    Patent number: 6898856
    Abstract: A letter opener is disclosed as including a body with a channel allowing an envelope to pass through, and a cutting blade extending into the channel, in which the body and the cutting blade are movable relative to each other to vary the position along the channel at which the cutting blade cuts the passing envelope. At least part of the channel is of a generally S shape.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: May 31, 2005
    Inventors: King Biu Mak, Chung Yin Ronald Mak, Chung Ming Mak
  • Apparatus for sharpening a writing instrument
    Patent number: 6637481
    Abstract: An apparatus for sharpening a writing instrument, e.g. an electric pencil sharpener, is disclosed as including a body for receiving a pencil for sharpening, and a base, the base having a bottom surface to support the apparatus on a surface, and the body may be positioned relative to the base in a first configuration and at least a second configuration, and when the body is positioned relative to the base in the first configuration, a longitudinal axis of the body and an axis perpendicular to the bottom surface of the base subtend a first angle, and when the body is positioned relative to the base in the second configuration, these two axes subtend a second angle which differs from the first angle.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: October 28, 2003
    Inventors: King Biu Mak, Chung Yin Ronald Mak, Chung Ming Mak
  • APPARATUS FOR SHARPENING A WRITING INSTRUMENT
    Publication number: 20030172992
    Abstract: An apparatus for sharpening a writing instrument, e.g. an electric pencil sharpener, is disclosed as including a body for receiving a pencil for sharpening, and a base, the base having a bottom surface to support the apparatus on a surface, and the body may be positioned relative to the base in a first configuration and at least a second configuration, and when the body is positioned relative to the base in the first configuration, a longitudinal axis of the body and an axis perpendicular to the bottom surface of the base subtend a first angle, and when the body is positioned relative to the base in the second configuration, these two axes subtend a second angle which differs from the first angle.
    Type: Application
    Filed: March 13, 2002
    Publication date: September 18, 2003
    Inventors: King Biu Mak, Chung Yin Ronald Mak, Chung Ming Mak
  • Mechanism for sharpening a writing instrument
    Patent number: 6397480
    Abstract: A pencil sharpener (10) is disclosed as including a body (12) with a hole (22) for receiving an end of a pencil, a cutting blade (24) secured to the body (12) for sharpening the pencil, and a stopper (30) movable relative to the body (12) to vary the length of the end of the pencil which may be received into the hole (22).
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: June 4, 2002
    Assignee: Mosel Vitelic Inc.
    Inventors: King Biu Mak, Chung Yin Ronald Mak, Chung Ming Mak
  • Clip dispenser
    Patent number: D452531
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: December 25, 2001
    Inventors: King Biu Mak, Chung Yin Ronald Mak, Chung Ming Mak