Patents by Inventor David R. Kerr

David R. Kerr 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).

  • Lower leg rolling apparatus
    Patent number: 5725224
    Abstract: The invention pertains to a rolling apparatus which is used when secured to the lower leg of a person. The rolling apparatus is comprised of 1) an elongate body portion with front and rear ends, and also presenting planar upper and lower surfaces; 2) a plurality of roller trucks secured to the lower surface of the elongate body portion, positioned adjacent opposite front and rear ends thereof; and 3) a means of securing the upper planar surface of the elongate body portion to the lower leg of the person.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: March 10, 1998
    Inventor: David R. Kerr
  • Topology induced plasma enhancement for etched uniformity improvement
    Patent number: 5714031
    Abstract: A plasma discharge electrode having a front surface with a central portion thereof including outlets for discharging reactant gas which forms a plasma and a peripheral portion substantially surrounding the outlets. The peripheral portion has at least one recess for locally enhancing a density of the plasma formed by the electrode. The recess can be formed in a replaceable insert and the electrode can be made from a single crystal of silicon.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 3, 1998
    Assignee: Lam Research Corporation
    Inventors: Randall S. Mundt, David R. Kerr, Eric Howard Lenz
  • Topology induced plasma enhancement for etched uniformity improvement
    Patent number: 5472565
    Abstract: A plasma discharge electrode having a front surface with a central portion thereof including outlets for discharging reactant gas which forms a plasma and a peripheral portion substantially surrounding the outlets. The peripheral portion has at least one recess for locally enhancing a density of the plasma formed by the electrode. The recess can be formed in a replaceable insert and the electrode can be made from a single crystal of silicon.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: December 5, 1995
    Assignee: Lam Research Corporation
    Inventors: Randall S. Mundt, David R. Kerr, Eric H. Lenz