Patents by Inventor Andrew Keith Kirk

Andrew Keith Kirk 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).

  • Centraliser
    Patent number: D662952
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: July 3, 2012
    Assignee: Downhole Products Limited
    Inventors: Andrew Keith Kirk, Ian Alastair Kirk
  • Centraliser
    Patent number: D671960
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: December 4, 2012
    Assignee: Downhole Products Limited
    Inventors: Andrew Keith Kirk, Ian Alastair Kirk