Daniel Chang

US Patent:

6643419, Nov 4, 2003

Filed:

Dec 5, 2001

Appl. No.:

10/010414

Inventors:

Daniel H. Chang - La Crescenta CA
Talal Azfar - Los Angeles CA
Harold R. Fetterman - Santa Monica CA
Joseph Michael - Los Angeles CA

Assignee:

Pacific Wave Industries, Inc. - Los Angeles CA

International Classification:

G02B 626

US Classification:

385 14, 385132, 385 8, 385145, 385126

Abstract:

A structure for effecting a transition from a passive waveguide to an active waveguide or from an active waveguide to a passive waveguide of the present invention. The inventive device comprises a first cladding; a first core disposed within the first cladding; and a ground plane disposed over the first cladding and the core. A second cladding is disposed on the ground plane. A second core is disposed on the second cladding. A third cladding is disposed on the second cladding and the second core and an electrode is disposed on top of the third cladding. The inventive structure enables the construction of a novel an advantageous switch comprising an input port; an output port; and plural waveguides disposed between the input port and the output port. Each waveguide includes a first cladding; a first core disposed within the first cladding; and a ground plane disposed over the first cladding and the core. A second cladding is disposed on the ground plane.

US Patent:

6847751, Jan 25, 2005

Filed:

Aug 11, 2003

Appl. No.:

10/639212

Inventors:

Daniel H. Chang - La Crescenta CA, US
Talal Azfar - Los Angeles CA, US
Harold R. Fetterman - Santa Monica CA, US
Joseph Michael - Los Angeles CA, US

Assignee:

Pacific Wave Industries, Inc. - El Segundo CA

International Classification:

G02B 626

US Classification:

385 16, 8 14, 8126, 8132, 8145

Abstract:

A structure for effecting a transition from a passive waveguide to an active waveguide or from an active waveguide to a passive waveguide of the present invention. The inventive device comprises a first cladding; a first core disposed within the first cladding; and a ground plane disposed over the first cladding and the core. A second cladding is disposed on the ground plane. A second core is disposed on the second cladding. A third cladding is disposed on the second cladding and the second core and an electrode is disposed on top of the third cladding. The inventive structure enables the construction of a novel an advantageous switch comprising an input port; an output port; and plural waveguides disposed between the input port and the output port. Each waveguide includes a first cladding; a first core disposed within the first cladding; and a ground plane disposed over the first cladding and the core. A second cladding is disposed on the ground plane.

US Patent:

8636640, Jan 28, 2014

Filed:

Apr 11, 2009

Appl. No.:

12/386006

Inventors:

Daniel Wonchul Chang - Arcadia CA, US

Assignee:

Brain Symphony LLC - Los Angeles CA

International Classification:

A61M 21/00

US Classification:

600 28

Abstract:

The present invention is a method of modifying music files to induce a desired state of consciousness. First and second modulations are introduced into a music file such that, when the music file is played, both of the modulations occur simultaneously. Additional modulations can be introduced, as well as sound tones at window frequencies.

US Patent:

20040071402, Apr 15, 2004

Filed:

Aug 11, 2003

Appl. No.:

10/639287

Inventors:

Daniel Chang - La Crescenta CA, US
Talal Azfar - Los Angeles CA, US
Harold Fetterman - Santa Monica CA, US
Joseph Michael - Los Angeles CA, US

International Classification:

G02B006/26

US Classification:

385/040000, 385/050000

Abstract:

A structure for effecting a transition from a passive waveguide to an active waveguide or from an active waveguide to a passive waveguide of the present invention. The inventive device comprises a first cladding; a first core disposed within the first cladding; and a ground plane disposed over the first cladding and the core. A second cladding is disposed on the ground plane. A second core is disposed on the second cladding. A third cladding is disposed on the second cladding and the second core and an electrode is disposed on top of the third cladding. The inventive structure enables the construction of a novel an advantageous switch comprising an input port; an output port; and plural waveguides disposed between the input port and the output port. Each waveguide includes a first cladding; a first core disposed within the first cladding; and a ground plane disposed over the first cladding and the core. A second cladding is disposed on the ground plane. A second core is disposed on the second cladding. A third cladding is disposed on the second cladding and the second core and an electrode is disposed on top of the third cladding. The inventive structure also enables a unique and advantageous router design comprising an active tuned arrayed waveguide grating and switching logic for controlling the grating.

US Patent:

20070192525, Aug 16, 2007

Filed:

Feb 15, 2006

Appl. No.:

11/307653

Inventors:

Daniel Chang - La Crescenta CA, US
Greg Cardell - La Canada CA, US

International Classification:

G06F 13/36

US Classification:

710306000

Abstract:

A translation device between client-server computer networks and the General Purpose Instrumentation Bus (GPIB). Methods for Write, Read, and Command transactions to conduct data transfer between client-server computer networks and GPIB. Separate data channels and a single control channel are utilized. No specialized driver software is required.

US Patent:

20100314160, Dec 16, 2010

Filed:

Jun 11, 2009

Appl. No.:

12/483166

Inventors:

Daniel Chang - Fullerton CA, US
Sam Najjar - Yucaipa CA, US

International Classification:

H05K 1/03
C08K 5/521
C08K 5/3492
B32B 17/04
B32B 27/36
B32B 27/34
B32B 27/06
C08J 5/24

US Classification:

174255, 524147, 524102, 442 59, 428480, 4284744, 4284735, 4273855

Abstract:

In accordance with the present invention compositions are described which are useful, for example, for the preparation of metal-clad laminate structures, methods for the preparation thereof, and various uses therefor. Invention metal-clad laminate structures are useful, for example, multi-layer board (MLB) industry, in the preparation of burn-in test boards and high reliability boards, applications where low coefficient of thermal expansion (CTE) is beneficial, in the preparation of boards used in down-hole drilling, and the like.

US Patent:

59326352, Aug 3, 1999

Filed:

Jul 1, 1996

Appl. No.:

8/673852

Inventors:

Jean Lee - Torrance CA
Albert Kuo - Cypress CA
Jack Douglas Boyd - San Clemente CA
Daniel Chang - Fullerton CA

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C08L 6300

US Classification:

523400

Abstract:

Fiber-reinforced prepregs with superior tack containing thermosetting resin systems containing particulate, elastomers having a Tg of 25. degree. C. and below, as well as the composites prepared therefrom are disclosed.

US Patent:

20190184850, Jun 20, 2019

Filed:

Dec 3, 2018

Appl. No.:

16/208075

Inventors:

- Pasadena CA, US
Zachary J. Lee - Pasadena CA, US
Steven H. Low - La Cañada CA, US
Daniel C. Chang - San Jose CA, US
Cheng Jin - Saratoga CA, US
Rand B. Lee - San Marino CA, US
George S. Lee - Pasadena CA, US

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

B60L 53/67
B60L 53/66
B60L 53/62
B60L 53/68
B60L 53/51

Abstract:

Adaptive charging networks in accordance with embodiments of the invention enable the optimization of electric design of charging networks for electric vehicles. One embodiment includes an electric vehicle charging network, including one or more centralized computing systems, a communications network, several, electric vehicle node controllers for charging several electric vehicles (EVs), where the one or more centralized computing systems is configured to: receive the electric vehicle node parameters from several electric vehicle node controllers, calculate a charging rates for the electric vehicle node controllers using quadratic programming (QP), where the quadratic programming computes the charging rates based on the electric vehicle node parameters, adaptive charging parameters and a quadratic cost function, and distributes the charging rates to the electric vehicle node controllers.