Patents by Inventor Michael Humlan

Michael Humlan 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).

  • Patent number: 5226196
    Abstract: A drain stopper including an inverted conical head fixedly and coaxially mounting a single shaft extending upwardly of the head terminating in a shaft head for ease of insertion and removal of the apparatus relative to an associated drain. A modification of the invention includes a stepped conical head to accommodate various diameters of drains, as well as a fluid port structure to project soap and the like within a water environment to enhance amusement and enjoyment of the organization by children.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: July 13, 1993
    Inventor: Michael Humlan