Christopher S Chang

US Patent:

8002799, Aug 23, 2011

Filed:

Jul 18, 2007

Appl. No.:

11/779526

Inventors:

Kingsley R. Chin - Philadelphia PA, US
Christopher A. Chang - Beverly MA, US

Assignee:

Spinefrontier LLS - Philadelphia PA

International Classification:

A61B 17/70
A61B 17/88

US Classification:

606246, 606 80, 606 96

Abstract:

A system for attaching first and second fixation elements at a predetermined angle relative to each other to first and second locations of a vertebra, respectively includes a first guide wire configured to be inserted into the first location of the vertebra, an angular guide system comprising first and second guide arms configured to be set at the predetermined angle relative to each other and the first guide arm is configured to be inserted over the first guide wire and a second guide wire configured to be inserted through the second guide arm into the second location of the vertebra. The second guide wire includes first and second members configured to pivot relative to each other.

US Patent:

8257355, Sep 4, 2012

Filed:

Jun 6, 2007

Appl. No.:

11/758809

Inventors:

Kingsley Richard Chin - Philadelphia PA, US
Christopher A. Chang - Beverly MA, US

Assignee:

Spinefrontier Inc. - Beverly MA

International Classification:

A61B 17/56
A61B 17/58
A61B 17/80
A61B 17/88
A61B 17/04
A61B 17/86
A61F 2/30
A61F 2/08

US Classification:

606 70, 606281, 606284, 606286, 606304

Abstract:

Methods and devices for static or dynamic spine stabilization include an anterior plating system that allows longitudinal and pivoting motion of the plates and of the stabilized vertebras. In one embodiment a spine fixation assembly for connecting a first vertebra to a second vertebra includes a first plate configured to be attached to one or more locations of the first vertebra and a second plate configured to be attached to one or more locations of the second vertebra. The first plate is pivotally connected to the second plate and may also allow longitudinal and/or horizontal motion of the plates relative to each other.

US Patent:

20090054987, Feb 26, 2009

Filed:

Jul 18, 2007

Appl. No.:

11/779470

Inventors:

Kingsley R. Chin - Philadelphia PA, US
Christopher A. Chang - Beverly MA, US

Assignee:

SPINEFRONTIER LLS - Philadelphia PA

International Classification:

A61F 2/44

US Classification:

623 1716, 623 1711

Abstract:

An improved interbody spinal fusion assembly for fusing a first vertebra to a second vertebra includes an interbody cage, a first plate and a second plate. The interbody cage is configured to be implanted between the first and second vertebras and comprises through-apertures configured to be filled with bone fusing material. The first plate comprises an L-shaped body having a first end configured to be attached to a first location of the interbody cage, a second end configured to be attached to a first location of the first vertebra and a corner formed between the first and second ends and configured to be attached to a second location of the first vertebra or a third location of the interbody cage. The second plate comprises a first end configured to be attached to a second location of the interbody cage and a second end configured to be attached to a first location of the second vertebra.

US Patent:

20130083699, Apr 4, 2013

Filed:

Oct 3, 2011

Appl. No.:

13/251849

Inventors:

Xinzhou Wu - Monmouth Junction NJ, US
Saurabh Tavildar - Jersey City NJ, US
Sundar Subramanian - Somerville NJ, US
Christopher S. Chang - Pasadena CA, US
Nilesh Khude - Bridgewater NJ, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 40/00
H04W 76/00
H04L 12/28

US Classification:

370255

Abstract:

An apparatus, a method of the apparatus, and a computer program in the apparatus are provided in which the apparatus determines a group to which each of a plurality of wireless devices is associated based on signals received from the plurality of wireless devices. The apparatus selects a group for access to a wireless medium from a plurality of groups based on the group determined for each of the plurality of wireless devices and based on reducing interference with the plurality of wireless devices. Each of the plurality of groups has a different priority. The apparatus communicates using peer-to-peer communication on the wireless medium with a priority based on the selected group.