Patents by Inventor Ho Chong Lee

Ho Chong Lee 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).

  • Magnetic deflector for a magnetic ink jet printer
    Patent number: 4078238
    Abstract: A magnetic deflector for a magnetic ink jet printer has compensating pole pieces which alter the gradient field produced by deflection pole pieces so as to counterbalance centering forces acting on magnetic ink drops moving through the magnetic field in off center locations. The compensating pole pieces are preferably passive and extend from the zero potential region of the magnetic circuit of the deflection pole pieces.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: March 7, 1978
    Assignee: International Business Machines Corporation
    Inventor: Ho Chong Lee
  • Multi-nozzle ink jet printer and method of printing
    Patent number: 4025925
    Abstract: A line printer has a print head with plural nozzles arranged in a single row generally transverse to the direction of relative motion of the print head and a print medium. The nozzles are spaced plural dot positions from each other corresponding to a plural dot segment of a single dot matrix character stroke. When the row of nozzles is slanted relative to the direction of motion, drops from the nozzles are used to print stroke segments in plural character strokes simultaneously.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: May 24, 1977
    Assignee: International Business Machines Corporation
    Inventors: Donald Frederick Jensen, Ho Chong Lee, John Carl Tamulis