Patents by Inventor Kung-Jong Lai

Kung-Jong Lai 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).

  • Pen device to prevent ink from being vaporized
    Patent number: 5092701
    Abstract: A writing pen having a retractible ink tube and a series of sealing disks for sealing the writing nib against vaporization or drying of ink on the nib surface when the ink tube is in its retracted position. A sliding sleeve is mounted around the ink tube to separate the ink tube from the seal assembly so as to prevent the ink from contaminating the seal assembly.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: March 3, 1992
    Inventor: Kung-Jong Lai