Patents by Inventor Bi-Hing Lai

Bi-Hing 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).

  • Ventilation device
    Patent number: 5820458
    Abstract: A ventilation device is composed of an air inlet base, an air guiding box mounted on the air inlet base, and a ventilation fan. The air guiding box is made up of a main body and a motor base mounted on the main body. The ventilation fan is mounted on the shaft of a motor which is in turn mounted on the motor base. The ventilation device is effectively downsized without compromising its ventilation efficiency.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: October 13, 1998
    Inventor: Bi-Hing Lai