Patents by Inventor Bill Lap Chow

Bill Lap Chow 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).

  • Publication number: 20110086585
    Abstract: A pipe tool comprises a head mounted on a shaft. The head has a primary channel having a circular profile of a primary channel diameter and a secondary channel having a circular profile of a secondary channel diameter. The secondary channel diameter is smaller than the primary channel diameter. The head has an intermediate wall having an intermediate wall outside surface defining an inside boundary of the primary channel, and the intermediate wall has an intermediate wall inside surface defining an outside boundary of the secondary channel. An intermediate wall gap passes between the primary channel and the secondary channel. An intermediate wall outside corner is disposed on the intermediate wall gap. An outside wall has an outside wall inside surface bounding the external periphery of the primary channel.
    Type: Application
    Filed: August 4, 2010
    Publication date: April 14, 2011
    Inventors: Thomas Chan Luu, Bill Lap Chow