Patents by Inventor Cheston Sung Yin Chan

Cheston Sung Yin Chan 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).

  • TONER CARTRIDGE IDENTIFICATION SYSTEM FOR A PRINTER
    Publication number: 20020168192
    Abstract: The present invention is a method and apparatus for communicating to a printer a type of installed printer cartridge, where the combination of the cartridge and the printer form a magnetic coupling that can generate a cartridge specific code to identify the toner cartridge as being of a predetermined type. In a preferred embodiment, the magnetic coupling is achieved using at least two reed switches preferably mounted on the printer, with the reed switches biased using fixed magnetic elements placed immediately adjacent the reed switches. In the absence of any further magnetic fields, the reed switches are selected to provide a known set of switch positions corresponding to a bit value of one (“1”) for an open circuit and a bit value of zero (“0”) for a closed circuit.
    Type: Application
    Filed: May 11, 2001
    Publication date: November 14, 2002
    Inventors: Ronald V. Surya, Gregory S. Kussmann, Cheston Sung Yin Chan
  • Toner cartridge identification system for a printer
    Patent number: 6477335
    Abstract: An apparatus for communicating to a printer a type of installed printer cartridge, where the combination of the cartridge and the printer form a magnetic coupling that can generate a cartridge specific code to identify the toner cartridge as being of a predetermined type. In a preferred embodiment, the magnetic coupling is achieved using at least two reed switches preferably mounted on the printer, with the reed switches biased using fixed magnetic elements placed immediately adjacent the reed switches. In the absence of any further magnetic fields, the reed switches are selected to provide a known set of switch positions corresponding to a bit value of one (“1”) for an open circuit and a bit value of zero (“0”) for a closed circuit.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: November 5, 2002
    Assignee: Troy Group, Inc.
    Inventors: Ronald V. Surya, Gregory S. Kussmann, Cheston Sung Yin Chan
  • Toner cartridge identification system for a printer
    Patent number: RE39773
    Abstract: An apparatus for communicating to a printer a type of installed printer cartridge, where the combination of the cartridge and the printer form a magnetic coupling that can generate a cartridge specific code to identify the toner cartridge as being of a predetermined type. In a preferred embodiment, the magnetic coupling is achieved using at least two reed switches preferably mounted on the printer, with the reed switches biased using fixed magnetic elements placed immediately adjacent the reed switches. In the absence of any further magnetic fields, the reed switches are selected to provide a known set of switch positions corresponding to a bit value of one (“1”) for an open circuit and a bit value of zero (“0”) for a closed circuit.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: August 14, 2007
    Assignee: Troy Group, Inc.
    Inventors: Ronald V. Surya, Gregory S. Kussman, Cheston Sung Yin Chan