Patents by Inventor Kweng-Ming Cheng

Kweng-Ming Cheng 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).

  • Tooth paste squeezing device with a spring biased roller assembly
    Patent number: 5178302
    Abstract: A tooth paste squeezing device comprising a frame attachable to a wall or a support, on which a pair of matched rollers having toothed surfaces engageable with each other are slidably mounted. A rotatable knob is secured on one of the rollers to rotate it and the rotation is transmitted to the other roller via a gear train so that when a tooth paste tube is inserted between the rollers and the knob is rotated to rotate the rollers, the tooth paste is squeezed out of the tube.
    Type: Grant
    Filed: January 2, 1992
    Date of Patent: January 12, 1993
    Inventor: Kweng-Ming Cheng