Patents by Inventor John Anthony Douglas Bruce Durham

John Anthony Douglas Bruce Durham 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).

  • Levelling device
    Patent number: 7797845
    Abstract: A mobile leveling apparatus for quickly and simply transferring the height of a visible, fixed datum point from a distant wall or column across a room. The leveling apparatus is hand-held and can be operated by a single user. The operator physically holds the apparatus at the actual point where the height of the datum point is required, thereby ensuring that the apparatus is always under his/her control.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: September 21, 2010
    Inventor: John Anthony Douglas Bruce Durham
  • LEVELLING DEVICE
    Publication number: 20090219522
    Abstract: A mobile leveling apparatus for quickly and simply transferring the height of a visible, fixed datum point from a distant wall or column across a room. The leveling apparatus is hand-held and can be operated by a single user. The operator physically holds the apparatus at the actual point where the height of the datum point is required, thereby ensuring that the apparatus is always under his/her control.
    Type: Application
    Filed: January 18, 2007
    Publication date: September 3, 2009
    Inventor: John Anthony Douglas Bruce Durham