Patents by Inventor Lawrence Tso

Lawrence Tso 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).

  • Method and apparatus for fabricating rotary cone drill bits
    Patent number: 6568490
    Abstract: A method for manufacturing drill bits in segments, using a single key which is nowhere concave in its axial profile to position all three segments together for welding; and drill bits so made.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: May 27, 2003
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Lawrence Tso, Mark Brookes, Tim Dietz