Patents by Inventor Liang-Min Chang

Liang-Min 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).

  • Wet tissue rolling-up device
    Patent number: 5803397
    Abstract: A wet tissue rolling-up device including a drive roller and a driven roller connected between two side boards, a conveying belt mounted around the drive roller and the driven roller and turned by the drive roller to deliver a wet tissue, and a guide belt surrounding the conveying roller and adapted for guiding delivered wet tissue, causing it to roll up into a wet tissue roll, wherein the conveying belt has a toothed inner wall, the drive roller and the driven roller hold a respective pair of ball bearings around a respective axle between the side boards and have a respective toothed outside wall meshed with the toothed inner wall of the conveying belt; a constraint device is mounted between the side boards to prohibit the conveying belt from moving sideways when the conveying belt is turned forwards by the drive roller.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: September 8, 1998
    Inventor: Liang-Min Chang
  • Paper towel container
    Patent number: D414062
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: September 21, 1999
    Inventor: Liang-Min Chang