Mark R Turner

US Patent:

6931002, Aug 16, 2005

Filed:

Dec 8, 1998

Appl. No.:

09/207745

Inventors:

Daniel S. Simpkins - Bethesda MD, US
Steve Brass - Westboro MA, US
Mark A. Turner - Ijamsville MD, US

International Classification:

H04L012/66

US Classification:

370354, 370374, 370381

Abstract:

A switch switches time division multiplexed (TDM) data and packet data from input ports to output ports. The swich comprises: a plurality of input ports receiving data, wherein each data comprises either TDM data or packet data; a plurality of output ports transmitting switched data; and a shared memory coupling the input ports to the output ports. The shared memory sequentially receives the data from the input ports, and switches a sequentially received data from a respective input port to a respective output port. Switching of packet data by the shared memory has no latency or jitter effect on switching of TDM data by the shared memory.

US Patent:

7239301, Jul 3, 2007

Filed:

May 2, 2005

Appl. No.:

11/119663

Inventors:

Matthew G. Liberty - Potomac MD, US
Daniel S. Simpkins - Bethesda MD, US
Charles W. K. Gritton - Sterling VA, US
Mark Turner - Ijamsville MD, US
Frank A. Hunleth - Rockville MD, US

Assignee:

Hillcrest Laboratories, Inc. - Rockville MD

International Classification:

G09G 5/08
G09G 5/00

US Classification:

345158, 345156, 345157, 345163

Abstract:

Systems and methods according to the present invention address these needs and others by providing a handheld device, e. g. , a 3D pointing device, which uses at least one sensor to detect motion of the handheld device. The detected motion can then be mapped into a desired output, e. g. , cursor movement.

US Patent:

7489298, Feb 10, 2009

Filed:

Jun 20, 2007

Appl. No.:

11/820510

Inventors:

Matthew G. Liberty - Gaithersburg MD, US
Daniel S. Simpkins - Bethesda MD, US
Charles W. K. Gritton - Sterling VA, US
Mark Turner - Ijamsville MD, US
Frank A. Hunleth - Rockville MD, US

Assignee:

Hillcrest Laboratories, Inc. - Rockville MD

International Classification:

G09G 5/08
G09G 5/00

US Classification:

345158, 345156, 345163

Abstract:

Systems and methods according to the present invention address these needs and others by providing a handheld device, e. g. , a 3D pointing device, which uses at least one sensor to detect motion of the handheld device. The detected motion can then be mapped into a desired output, e. g. , cursor movement.

US Patent:

7719261, May 18, 2010

Filed:

Nov 27, 2006

Appl. No.:

11/605050

Inventors:

Friedrich Geck - Mt. Airy MD, US
Matthew G. Liberty - Potomac MD, US
Mark Turner - Ijamsville MD, US

Assignee:

Hillcrest Laboratories, Inc. - Rockville MD

International Classification:

G01R 35/00
G01D 18/00

US Classification:

324202, 73 101, 702104

Abstract:

Systems and methods according to exemplary embodiments address, among other features, the area of calibrating a sensor using a constant vector field. In one exemplary embodiment, a method for calibrating a sensor includes the steps of placing the sensor in a cube, rotating the cube between a plurality of different orientations, collecting at least one reading from the sensor from each of the plurality of different orientations and calibrating the sensor using the collected readings.

US Patent:

20080158154, Jul 3, 2008

Filed:

Jun 20, 2007

Appl. No.:

11/820525

Inventors:

Matthew G. Liberty - Gaithersburg MD, US
Daniel S. Simpkins - Bethesda MD, US
Charles W.K. Gritton - Sterling VA, US
Mark Turner - Ijamsville MD, US
Frank A. Hunleth - Rockville MD, US

Assignee:

Hillcrest Laboratories, Inc. - Rockville MD

International Classification:

G09G 5/08
G09G 5/00

US Classification:

345158

Abstract:

Systems and methods according to the present invention address these needs and others by providing a handheld device, e.g., a 3D pointing device, which uses at least one sensor to detect motion of the handheld device. The detected motion can then be mapped into a desired output, e.g., cursor movement.

US Patent:

20130093676, Apr 18, 2013

Filed:

Dec 10, 2012

Appl. No.:

13/709600

Inventors:

HILLCREST LABORATORIES, INC. - Rockville MD, US
Daniel S. Simpkins - Bethesda MD, US
Charles W. K. Gritton - Sterling VA, US
Mark Turner - Ijamsville MD, US
Frank A. Hunleth - Rockville MD, US

Assignee:

HILLCREST LABORATORIES, INC. - Rockville MD

International Classification:

G06F 3/0346

US Classification:

345158

Abstract:

Systems and methods according to the present invention address these needs and others by providing a handheld device, e.g., a 3D device, which uses at least one sensor to detect motion of the handheld device. The detected motion can then be mapped into a desired output, e.g., cursor movement.

US Patent:

20210318142, Oct 14, 2021

Filed:

Jun 24, 2021

Appl. No.:

17/356613

Inventors:

- Wilmington DE, US
Yun Li - Clarksburg MD, US
Mark Turner - Ijamsville MD, US

International Classification:

G01C 25/00
G01C 21/16
G01P 15/14

Abstract:

Methods, apparatus, and systems for estimating and calibrating a gyroscope's scale using a magnetometer mounted on the same device by rotating the device about an axis multiple times; and, during the first rotation, storing the magnetometer magnetic field reading and a heading (from integration of the gyroscope readings) at each of a plurality of angular reference points; then, during each subsequent rotation, determining magnetometer/gyroscope-heading output pairs for which the magnetometer output matches the magnetometer reading corresponding to one of the reference points, thereby indicating that the device has reached the same heading as the matching reference point; then, for each matching output sample pair, using that magnetometer/gyroscope-heading output sample pair to update the gyroscope scale factor for the corresponding angular reference point; and averaging those scale estimates to generate a final gyroscope scale factor estimate.

US Patent:

20200110474, Apr 9, 2020

Filed:

Nov 19, 2019

Appl. No.:

16/688448

Inventors:

- Wilmington DE, US
Daniel S. SIMPKINS - Bethesda MD, US
Charles W. K. GRITTON - Sterling VA, US
Mark TURNER - Ijamsville MD, US
Frank A. HUNLETH - Rockville MD, US

International Classification:

G06F 3/0346
G06F 1/3215
G06F 1/3234
G06F 3/038
H04N 21/422
G06K 9/00

Abstract:

Systems and methods according to the present invention address these needs and others by providing a handheld device, e.g., a 3D pointing device, which uses at least one sensor to detect motion of the handheld device. The detected motion can then be mapped into a desired output, e.g., cursor movement.