Patents by Inventor David Kenneth Booth

David Kenneth Booth 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).

  • Apparatus for determining the location of a pointer within a region of interest
    Patent number: 8456418
    Abstract: An apparatus for detecting a pointer within a region of interest includes a first reflective element extending along a first side of the region of interest and reflecting light towards the region of interest. A second reflective element extends along a second side of the region of interest and reflects light towards the region of interest. The second side is joined to the first side to define a first corner. A non-reflective region generally in the plane of at least one of the first and second reflective elements is adjacent the first corner. At least one imaging device captures images of the region of interest including reflections from the first and second reflective elements.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: June 4, 2013
    Assignee: SMART Technologies ULC
    Inventors: Chi Man Charles Ung, David Kenneth Booth, Stephen Worthington, Mark Andrew Fletcher, Roberto A. L. Sirotich
  • APPARATUS FOR DETERMINING THE LOCATION OF A POINTER WITHIN A REGION OF INTEREST
    Publication number: 20120274765
    Abstract: An apparatus for detecting a pointer within a region of interest comprises a first reflective element extending along a first side of the region of interest and reflecting light towards the region of interest. The first reflective element comprises at least two generally parallel bands thereon, the bands at least comprising a retro-reflective band and a reflective band. A second reflective element extends along a second side of the region of interest and reflects light towards the region of interest, the second side being joined to the first side to define a first corner. The second reflecting element comprises at least two generally parallel bands thereon, the bands at least comprising a retro-reflective band and a reflective band. At least one imaging device captures images of the region of interest including reflections from the reflective and retro-reflective bands of the first and second reflective elements.
    Type: Application
    Filed: February 28, 2012
    Publication date: November 1, 2012
    Applicant: SMART TECHNOLOGIES ULC
    Inventors: Chi Man Charles Ung, David Kenneth Booth, Stephen Worthington, Roberto A.L. Sirotich, Mark Andrew Fletcher, Holly Wytrykush
  • Dual mode touch systems
    Patent number: 8274496
    Abstract: An apparatus for detecting a pointer includes a waveguide and a touch surface over the waveguide on which pointer contacts are to be made. At least one reflecting device extends along a first side of the waveguide and touch surface. The reflecting device defines an optical path between the interior of the waveguide and the region of interest above the touch surface. At least one imaging device looks across the touch surface and into the waveguide. The imaging device captures images of the region of interest and within the waveguide including reflections from the reflecting device.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: September 25, 2012
    Assignee: SMART Technologies ULC
    Inventors: Chi Man Charles Ung, David Kenneth Booth, Roberto A. L. Sirotich
  • DUAL MODE TOUCH SYSTEMS
    Publication number: 20090146973
    Abstract: An apparatus for detecting a pointer includes a waveguide and a touch surface over the waveguide on which pointer contacts are to be made. At least one reflecting device extends along a first side of the waveguide and touch surface. The reflecting device defines an optical path between the interior of the waveguide and the region of interest above the touch surface. At least one imaging device looks across the touch surface and into the waveguide. The imaging device captures images of the region of interest and within the waveguide including reflections from the reflecting device.
    Type: Application
    Filed: October 31, 2008
    Publication date: June 11, 2009
    Applicant: SMART TECHNOLOGIES ULC
    Inventors: Chi Man Charles Ung, David Kenneth Booth, Roberto A.L. Sirotich
  • Apparatus for determining the location of a pointer within a region of interest
    Patent number: 7274356
    Abstract: An apparatus for detecting a pointer within a region of interest includes a first reflective element extending along a first side of the region of interest and reflecting light towards the region of interest. A second reflective element extends along a second side of the region of interest and reflects light towards the region of interest. The second side is joined to the first side to define a first corner. A non-reflective region generally in the plane of at least one of the first and second reflective elements is adjacent the first corner. At least one imaging device captures images of the region of interest including reflections from the first and second reflective elements.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: September 25, 2007
    Assignee: Smart Technologies Inc.
    Inventors: Chi Man Charles Ung, David Kenneth Booth, Stephen Worthington, Mark Andrew Fletcher, Roberto A. L. Sirotich