Patents by Inventor David S. Graham

David S. Graham 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: 20190220556
    Abstract: A method includes, based on information received from a user through a graphical user interface, forming and storing elements that define a model that can be run by a computer to simulate operation of a real-world system that includes real-world features. The method includes including in the elements that are formed and stored, collections of software entities that correspond to the real-world features, and running the model using the software entities.
    Type: Application
    Filed: January 24, 2019
    Publication date: July 18, 2019
    Inventors: Larry F. Yeager, Thomas S. Fiddaman, David W. Peterson, Alan Karl Graham
  • Patent number: 10333720
    Abstract: Method for establishing secure communication between a plurality of IoT devices in one or more vehicles include: provisioning the plurality of IoT devices by providing a unique identification, a digital identity token and a cryptographic key to each of the plurality of IoT devices; establishing a secure communication line between the plurality of IoT devices by authenticating respective communication lines between respective IoT devices and issuing a digital certificate to the respective communication lines; grouping the plurality of IoT devices into different groups based on a predetermined criteria; and including a group membership for a group of the different groups in an attribute certificate indicating group characterization.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: June 25, 2019
    Assignee: T-CENTRAL, INC.
    Inventors: David W. Kravitz, Donald Houston Graham, III, Josselyn L. Boudett, Russell S. Dietz, Kent William Stacy
  • Publication number: 20190190324
    Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.
    Type: Application
    Filed: September 20, 2017
    Publication date: June 20, 2019
    Inventors: Chad A. Bossetti, Christopher S. Graham, David W. Ritter, Todd K. Moyer, Steven G. Herbst, Shimon Elkayam, Nileshbhai J. Shah, Stephen C. Terry, Zaki Moussaoui
  • Publication number: 20190165748
    Abstract: An audio system having a variable reset volume, and a method of conditionally resetting a volume parameter, are described. The audio system can include a processor to generate an audio signal for a speaker to convert into a sound. A volume parameter of the audio signal can be set before a user pauses playback of the audio signal. The processor can determine that the volume parameter is outside of a resting volume range, and that the user resumes playback of the audio signal at least a selected interval after pausing playback. The processor can responsively reset the volume parameter when playback is resumed to a different level based on one or more acoustic factors, such as an audio decay time of a surrounding environment. The different level can be within the resting volume range. Other aspects are also described and claimed.
    Type: Application
    Filed: July 27, 2018
    Publication date: May 30, 2019
    Inventors: Richard M. Powell, Kshitij S. Deshpande, David Chance Graham, Hugo Verweij, Afrooz Family
  • Publication number: 20190140849
    Abstract: Method for authenticating a first and a second electronic devices associated through a communication line includes: creating a unique ID, by a third electronic device; transmitting the unique ID to the first electronic device; signing the transmitted unique ID by the first electronic device; transmitting the signed unique ID to the second electronic device, by the first electronic device; signing the transmitted signed unique ID by the second electronic device; transmitting the unique ID signed by the first and second electronic devices to the third electronic device; verifying and accepting the unique ID signed by the first device and the second device, by the third device; issuing a certificate for a secure communication line between the first electronic device and the second electronic device; and transmitting the certificate to the first electronic device and the second electronic device.
    Type: Application
    Filed: December 28, 2018
    Publication date: May 9, 2019
    Inventors: David W. Kravitz, Donald Houston Graham, Josselyn L. Boudett, Russell S. Dietz, Kent Willam Stacy
  • Patent number: 7786983
    Abstract: A touch screen or pen-based data entry apparatus and method. The data entry apparatus creates a continuous sheet or “lamina” of light in the free space adjacent a touch screen. An optical position detection device, optically coupled to the lamina of light, is provided to detect data entries to the input device by determining the location of interrupts in the lamina caused when data is entered to the input device. During the method of operation, a user makes a data entry to the device by touching the screen at a predetermined location using an input device, such as a finger, pen or stylus. During the act of touching the screen, the lamina of light in the free space adjacent the screen is interrupted. The optical position detection device detects the position of the input based on the location of the interrupt. Based on the determined position, the data entry is determined.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: August 31, 2010
    Assignee: Poa Sana Liquidating Trust
    Inventor: David S. Graham
  • Publication number: 20100194207
    Abstract: A device including a wireless power transmitter is connected to a light fixture rather than a standard electrical outlet. Optionally, the device also includes at least one light source or includes at least one socket for a light source. Thus, the device connected to the light fixture can output power from the wireless power transmitter and light from the light source. In one embodiment, a power splitter enables independent control over powering the light and the wireless electricity transmitter. This feature allows, for example, the light to be turned off or on while the wireless electricity transmitter remains on. In some embodiments, the device including the wireless power transmitter has the form of a light bulb or light tube, whereas in other embodiments, the device does not have the form of a light bulb or light tube.
    Type: Application
    Filed: February 4, 2010
    Publication date: August 5, 2010
    Inventor: David S. Graham
  • Publication number: 20100012819
    Abstract: In one embodiment, a transmitter assembly containing a light source is electrically powered. The light source receives electrical power and converts the electrical power to an optical power beam that is directed through free space to an optical-to-elect power converter for a device. The optical-to-electric power converter converts the optical power beam to electrical form, thus providing electrical power to a device. A safety subsystem assures that the emission beyond the hot zone between the transmitter and receiver do not exceed regulatory levels.
    Type: Application
    Filed: January 24, 2007
    Publication date: January 21, 2010
    Inventor: David S. Graham
  • Patent number: 7520050
    Abstract: An apparatus and method for an inexpensive, simple to make, self-aligning molded waveguide made of an optically transparent material and that can be used to generate a grid or lamina of light for use with touch screen displays. The molded waveguide substrate includes a plurality of lenses and a plurality of waveguide grooves corresponding to the plurality of integral lenses respectively. After the substrate is molded, the grooves are filled with an optically transparent material to optically couple and align the plurality of lenses and the plurality of grooves respectively. In one application, the molded waveguide substrate is positioned adjacent a touch screen device. A light transmitter and an imaging device are optically coupled to the molded waveguide substrate, and a processing device is coupled to the imaging device.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: April 21, 2009
    Assignee: PoaSana Liquidating Trust
    Inventor: David S. Graham
  • Patent number: 7471865
    Abstract: An apparatus and method for an inexpensive, simple to make, self-aligning molded waveguide made of an optically transparent material and that can be used to generate a grid or lamina of light for use with touch screen displays. The molded waveguide substrate includes a plurality of lenses and a plurality of waveguide grooves corresponding to the plurality of integral lenses respectively. After the substrate is molded, the grooves are filled with an optically transparent material to optically couple and align the plurality of lenses and the plurality of grooves respectively. In one application, the molded waveguide substrate is positioned adjacent a touch screen device. A light transmitter and an imaging device are optically coupled to the molded waveguide substrate, and a processing device is coupled to the imaging device.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: December 30, 2008
    Assignee: Poa Sana Liquidating Trust
    Inventor: David S. Graham
  • Publication number: 20080130124
    Abstract: Embodiments of the invention include a power beam receiver that will not reflect light beyond the regulatory limits for human exposure, except along paths known to be without people. In one embodiment, a baffle is used to trap reflections from surfaces of the receiver. In a second embodiment, the power beam receiver is arranged so that reflections are reflected to another surface of the receiver. These surfaces may be designed as a retroreflector. In a third embodiment, an intentional scattering medium is added to the power beam receiver so that parallel light rays incident on the front surface of the power beam receiver are scattered through a series of angles. As a result, any light escaping the system is diffused.
    Type: Application
    Filed: November 21, 2007
    Publication date: June 5, 2008
    Applicant: PowerBeam, Inc.
    Inventor: David S. Graham
  • Patent number: 7099553
    Abstract: An apparatus and method for generating a lamina of light. The apparatus includes an optically transparent member having an input configured to receive light and one or more facets formed in the optically transparent member. As light enters and travels through the member, a lamina of light is created by the light reflecting off the facets. In one application, the lamina of light is provided in the free space adjacent a touch screen display. When the lamina is interrupted during a data entry operation to the screen, an optical position detection device is used to determine the data input based on the location of the interrupt in the lamina. In various other embodiments, the position and uniformity of the lamina may be controlled by selecting the angle, depth and tilt of a reflective surface of the facets in the optically transparent member.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: August 29, 2006
    Assignee: Poa Sona, Inc.
    Inventors: David S. Graham, Guolin Ma, David A. Schleuning, Warren Lewis
  • Publication number: 20040201579
    Abstract: A touch screen or pen-based data entry apparatus and method. The data entry apparatus creates a continuous sheet or “lamina” of light in the free space adjacent a touch screen. An optical position detection device, optically coupled to the lamina of light, is provided to detect data entries to the input device by determining the location of interrupts in the lamina caused when data is entered to the input device. During the method of operation, a user makes a data entry to the device by touching the screen at a predetermined location using an input device, such as a finger, pen or stylus. During the act of touching the screen, the lamina of light in the free space adjacent the screen is interrupted. The optical position detection device detects the position of the input based on the location of the interrupt. Based on the determined position, the data entry is determined.
    Type: Application
    Filed: April 1, 2004
    Publication date: October 14, 2004
    Applicant: Poa Sana, Inc., A California Corporation
    Inventor: David S. Graham
  • Publication number: 20020088930
    Abstract: A user input device for an electronic device is disclosed. The user input device provides positional information using a grid of light. The grid of light is produced from a light source and waveguides. The grid of light is also received and processed using waveguides and a light detector. Optionally, optics may be used to enhance the operation of the user input device. The user input device is particularly suited for use as a user input device for a computer system or the like.
    Type: Application
    Filed: January 11, 2002
    Publication date: July 11, 2002
    Inventors: David S. Graham, Daniel A. Francis
  • Patent number: 6351260
    Abstract: A user input device for an electronic device is disclosed. The user input device provides positional information using a grid of light. The grid of light is produced from a light source and waveguides. The grid of light is also received and processed using waveguides and a light detector. Optionally, optics may be used to enhance the operation of the user input device. The user input device is particularly suited for use as a user input device for a computer system or the like.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: February 26, 2002
    Assignee: Poa Sana, Inc.
    Inventors: David S. Graham, Daniel A. Francis
  • Patent number: 6181842
    Abstract: XY position digitizer 10 has an X send substrate 11X with an associated X receive substrate 12X, and a Y send substrate 11Y with an associated Y receive substrate 12Y, defining free space region 10F therebetween. Send waveguides 13X are embedded in the X send substrate and send waveguides 13Y are embedded in the Y send substrate. The send waveguides sends an array of send light beams 15X across the free space region to the X receive substrate. The send waveguides likewise sends an array of send light beams 15Y across the free space region to the Y receive substrate. Receive waveguides 16X are embedded in the X receive substrate and receive waveguides 16Y are embedded in the Y receive substrate in correspondence with the X and Y send waveguides. Each receive waveguide receives at least a portion of the light beam from the corresponding send waveguide. An array of X send optical systems 18X are embedded in the X send substrate.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: January 30, 2001
    Assignee: Poa Sana, Inc.
    Inventors: Daniel A. Francis, David S. Graham
  • Patent number: 5914709
    Abstract: A user input device for an electronic device is disclosed. The user input device provides positional information using a grid of light. The grid of light is produced from a light source and waveguides. The grid of light is also received and processed using waveguides and a light detector. Optionally, optics may be used to enhance the operation of the user input device. The user input device is particularly suited for use as a user input device for a computer system or the like.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: June 22, 1999
    Assignee: Poa Sana, LLC
    Inventors: David S. Graham, Daniel A. Francis
  • Patent number: 5765803
    Abstract: A suspension system for a seat for a vehicle having a base frame rigidly attached to the vehicle. The front of a seat support frame is pivotally moveable with respect to the base frame. Springs mounted between the seat support frame and the base frame cushion the seat from forces imparted while driving the vehicle on irregular surfaces. The springs further limit the pivotal movement of the seat support frame with respect to the base frame. There are shock absorbers for dissipating energy absorbed by the springs. The pivotal movement of the seat is around two different axes of rotation, one of the axes being a horizontal axis extending across the width of the vehicle and the other axis being a longitudinal axis extending from the front to the rear of the vehicle.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: June 16, 1998
    Inventor: David S. Graham