Patents by Inventor Dan Williamson

Dan Williamson 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).

  • Needle-free injection system
    Patent number: 6676630
    Abstract: A needle-free injection device. The injection device includes a user-grippable housing and a syringe assembly movably secured to the housing. The syringe assembly is configured to expel injectable fluid out of a nozzle upon application of pressurized gas to the syringe assembly. The injection device also includes a pressurized gas delivery mechanism disposed within the housing and configured to selectively apply pressurized gas to the syringe assembly. The pressurized gas delivery mechanism is at least partly actuated by pressing the nozzle onto an injection site so that the syringe assembly moves relative to the housing.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: January 13, 2004
    Assignee: Bioject Medical Technologies, Inc.
    Inventors: Sergio Landau, Dan Williamson, John R. Marshall
  • NEEDLE-FREE INJECTION SYSTEM
    Publication number: 20030225368
    Abstract: A needle-free injection device. The injection device includes a user-grippable housing and a syringe assembly movably secured to the housing. The syringe assembly is configured to expel injectable fluid out of a nozzle upon application of pressurized gas to the syringe assembly. The injection device also includes a pressurized gas delivery mechanism disposed within the housing and configured to selectively apply pressurized gas to the syringe assembly. The pressurized gas delivery mechanism is at least partly actuated by pressing the nozzle onto an injection site so that the syringe assembly moves relative to the housing.
    Type: Application
    Filed: June 4, 2002
    Publication date: December 4, 2003
    Applicant: Bioject Inc.
    Inventors: Sergio Landau, Dan Williamson, John R. Marshall
  • Well perforator isolation apparatus and method
    Patent number: 5701957
    Abstract: Disclosed is an improved apparatus and method for performing downhole operations to a subterranean formation while isolating the formation from the remainder of the well bore. The invention utilizes a tool assembly which initially sets a packer above the formation while allowing a downhole tool to extend through a passageway in the packer to perform operations such as perforating the formation. The assembly permits retrieval of the tools through the passageway in the packer while sealing off the formation from the remainder of the well.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: December 30, 1997
    Assignee: Halliburton Company
    Inventors: Dan Williamson, James A. Mills, John J. Ryan, III
  • Automotive stop light bulb
    Patent number: D380563
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: July 1, 1997
    Inventor: Dan Williamson