Patents by Inventor Pil M. Yum

Pil M. Yum 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).

  • Gravity fed humidifier
    Patent number: 5203505
    Abstract: A gravity fed humidifier has a reservoir for holding a liquid to be evaporated. The reservoir has openings in the bottom of the reservoir through which the liquid passes and two side walls extending upwardly from the bottom wall. The reservoir is suspended over an absorbent material by at least one support leg to which is attached a circular support surface for supporting the absorbent material. A drip tray is provided beneath the absorbent material and the openings for catching liquid that is not evaporated by the surrounding air.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: April 20, 1993
    Inventor: Pil M. Yum