Patents by Inventor Andrew Christensen

Andrew Christensen 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).

  • Publication number: 20100065420
    Abstract: An electrode for effective ozone production in an electrochemical cell uses a modified electrode design which adopts a novel catalytic component. The catalytic component has a number of elements selected from various metals and metalloids, and is applied to a substrate in multiple coatings or layers. The catalytic component forms a catalytic surface which is at least partially disrupted by the presence of an element which is relatively inactive with respect to oxygen evolution.
    Type: Application
    Filed: June 19, 2007
    Publication date: March 18, 2010
    Applicant: CLARIZON LIMITED
    Inventors: Paul Andrew Christensen, Wen Feng Lin
  • Publication number: 20100056872
    Abstract: A mobile device monitors accelerations using one or more inertial sensors. A user activity is identified based on the accelerations. A first estimation is made of a user activity statistic associated with the user activity based on the accelerations. Location information is obtained by one or more location based sensors. A second estimation is made of the user activity statistic based on the location information. The user activity statistic is calculated based on the first estimation and the second estimation.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 4, 2010
    Inventors: Philippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brian Y. Lee, David Vogel
  • Patent number: 7653508
    Abstract: A method for monitoring human activity using an inertial sensor includes continuously determining an orientation of the inertial sensor, assigning a dominant axis, updating the dominant axis as the orientation of the inertial sensor changes, and counting periodic human motions by monitoring accelerations relative to the dominant axis.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: January 26, 2010
    Assignee: DP Technologies, Inc.
    Inventors: Philippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brian Y. Lee, David Vogel
  • Patent number: 7647196
    Abstract: A method of monitoring human activity includes monitoring accelerations using an inertial sensor disposed at one of a plurality of locations on a human body, wherein at least one of the plurality of locations is not a foot location. A plurality of steps are counted based on the accelerations. A gait characteristic of the plurality of steps is determined. The characteristic is used to determine a stride length. At least one of a distance traveled and a speed of travel are determined based on the stride length.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: January 12, 2010
    Assignee: DP Technologies, Inc.
    Inventors: Philippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brian Y. Lee, David Vogel, Paul Andrew Mietz Egli
  • Publication number: 20090319221
    Abstract: An electronic device monitors accelerations using an inertial sensor. The electronic device identifies a current motion state based on the accelerations. The electronic device determines an application that subscribes to a motion state identification service and notifies the application of the current motion state.
    Type: Application
    Filed: June 23, 2009
    Publication date: December 24, 2009
    Inventors: Philippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brain Y. Lee, David Vogel
  • Publication number: 20090274317
    Abstract: A method or apparatus to provide an improved headset. The headset includes at least one sensor. The headset further includes a configuration logic to configure the headset based on the position of the headset on the user's head.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 5, 2009
    Inventors: Philippe Kahn, Arthur Kinsolving, Michael Cory Fairman, Mark Andrew Christensen, Peter William Spaulding
  • Publication number: 20090234614
    Abstract: A method for monitoring human activity using an inertial sensor includes obtaining acceleration measurement data from an inertial sensor disposed in eyewear. The acceleration measurement data is processed to determine a user activity statistic. The user activity statistic includes at least one of a current user activity, periodic human motion count, total distance traveled, vertical distance traveled, current speed and average speed.
    Type: Application
    Filed: April 23, 2008
    Publication date: September 17, 2009
    Inventors: Philippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brian Y. Lee, David Vogel
  • Publication number: 20090104496
    Abstract: The present invention relates to direct and reformate methanol fuel cells containing an anode comprising semiconductor layers. A semiconductor layer, preferably silicon or silicon carbide, is overlaid with a TiO2 layer. An open metal over-layer, preferably platinum optionally applied over a layer of inert metal such as gold, is deposited on the TiO2 layer, optionally in the form of a grid. It has been found that the active OH species generated in the presence and absence of light irradiation at the TiO2 surface in this device eliminates the need for ruthenium to be present. Furthermore, studies have unexpectedly shown that an electric field applied via an electrode on the surface of the TiO2 appears not to be required for the benefits to occur. This invention is thought to be particularly applicable to micro fuel cells.
    Type: Application
    Filed: July 14, 2006
    Publication date: April 23, 2009
    Applicant: GEN-X POWER CORP
    Inventors: Paul Andrew Christensen, Nicholas George Wright, Terence Arthur Egerton
  • Publication number: 20090043531
    Abstract: A method of monitoring human activity includes monitoring accelerations using an inertial sensor disposed at one of a plurality of locations on a human body, wherein at least one of the plurality of locations is not a foot location. A plurality of steps are counted based on the accelerations. A gait characteristic of the plurality of steps is determined. The characteristic is used to determine a stride length. At least one of a distance traveled and a speed of travel are determined based on the stride length.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Inventors: Philippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brian Y. Lee, David Vogel, Paul Andrew Mietz Egli
  • Patent number: 7457719
    Abstract: One or more rolling averages of accelerations over a sample period are created. The one or more rolling averages of accelerations are measured by an accelerometer over the sample period. A gravitational influence is identified based upon the one or more rolling averages of accelerations. A dominant axis is assigned based upon the gravitational influence.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: November 25, 2008
    Assignee: Fullpower Technologies, Inc.
    Inventors: Philippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brian Y Lee
  • Publication number: 20050133955
    Abstract: Systems and methods are provided for designing and producing a custom-fit prosthesis. According to one embodiment, a mold is produced from which a custom-fit implant may be directly or indirectly manufactured. Medical image data representing surrounding portions of a patient's anatomy to be repaired by surgical implantation of the custom-fit implant are received. Then, three-dimensional surface reconstruction is performed based on the medical image data. Next, the custom-fit implant is designed based on the three-dimensional surface reconstruction and a positive or negative representation of a two-part mold is created with a void in the shape of the custom-fit implant by subtracting a representation of the custom-fit implant from a representation of a mold. Finally, the two-part mold is output from which the custom-fit implant may be directly manufactured; or an implant is directly output. Alternatively, an intermediate mold is created from which a two-part mold may be directly manufactured.
    Type: Application
    Filed: September 30, 2004
    Publication date: June 23, 2005
    Applicant: MEDICAL MODELING LLC
    Inventor: Andrew Christensen
  • Publication number: 20050043835
    Abstract: Systems and methods are provided for designing and producing custom-fit prosthesis. According to one embodiment, a mold is produced from which a custom-fit implant may be directly manufactured. Medical image data representing surrounding portions of a patient's anatomy to be repaired by surgical implantation of the custom-fit implant are received. Then, three-dimensional surface reconstruction is performed based on the medical image data. Next, the custom-fit implant is designed based on the three-dimensional surface reconstruction and a two-part mold is created with a void in the shape of the custom-fit implant by subtracting a representation of the custom-fit implant from a representation of a mold. Finally, the two-part mold is output from which the custom-fit implant may be directly manufactured.
    Type: Application
    Filed: September 30, 2003
    Publication date: February 24, 2005
    Applicant: Medical Modeling LLC
    Inventor: Andrew Christensen