Chin Ming Chang

US Patent:

6474138, Nov 5, 2002

Filed:

Nov 28, 2000

Appl. No.:

09/724536

Inventors:

Chin H. Chang - Palatine IL
Ulrich Bonne - Hopkins MN
Richard A. Alderman - Freeport IL

Assignee:

Honeywell International Inc. - Morristown NJ

International Classification:

G01N 2548

US Classification:

73 2501, 73 2505, 73 2331, 73 3105

Abstract:

A carbon monoxide sensor and method is shown and described. The sensor includes a sensing element that includes an adsorbent dispersed over a support material. The adsorbent is capable of exothermically adsorbing carbon monoxide. The sensor also includes a temperature sensor in contact with the sensing element and a signal processing module coupled to the temperature sensor. The temperature sensor communicates signals indicative of a temperature increase of the sensing element to the processing module, thereby indicating an adsorption and, therefore, a presence of carbon monoxide.

US Patent:

20040120720, Jun 24, 2004

Filed:

Dec 24, 2002

Appl. No.:

10/329225

Inventors:

Chin Chang - Walnut CA, US
Amado Cordova - Venice CA, US

International Classification:

H04B010/00

US Classification:

398/139000, 398/135000

Abstract:

A fiber optic transceiver includes a VCSEL light source. The transceiver is adapted to communicate with existing LED-based transceivers to enable external electronic circuits to interact. The transceiver of the invention includes an InGaAs photodetector for receiving 1310 nm signals emitted from the LED light source of an existing transceiver. The existing transceiver typically includes an InGaAs photodetector characterized by distinct responsivities at 850 nm and at 1310 nm. This enables signals transmitted at 850 nm from the VCSEL light source of the transceiver to be detected by an existing LED-based transceiver, while the InGaAs photodetector of the transceiver of the invention is capable of receiving signals emitted from the LED light source.

US Patent:

20040184746, Sep 23, 2004

Filed:

Mar 17, 2003

Appl. No.:

10/388990

Inventors:

Chin Chang - Walnut CA, US
Chung-Chien Chen - Rowland Heights CA, US
Trong-Huang Lee - Walnut CA, US

International Classification:

G02B006/44

US Classification:

385/100000

Abstract:

Apparatus for extending the range of effective communication of high speed digital video data between remote devices, such as a microprocessor and a flat panel display, having associated DVI standard connectors. A fiber optic cable comprising a plurality of fibers provides optical paths for signal transmission between the DVI connectors. Electrooptic converters are provided for converting the electrical signals sent and received by each of the connectors to optical form for transmission over the optical fiber cable.

US Patent:

20050053515, Mar 10, 2005

Filed:

Sep 10, 2003

Appl. No.:

10/660354

Inventors:

Stephen Yates - Arlington Heights IL, US
Felipe Fuentes - Harbor City CA, US
Peter Michalakos - Chicago IL, US
Chin Chang - Palatine IL, US
Brian Krafthefer - Stillwater MN, US
Mark Kaiser - Arlington Heights IL, US

Assignee:

Honeywell International Inc. - Morristown NJ

International Classification:

A61L009/16

US Classification:

422004000, 422122000, 422121000

Abstract:

An air quality system comprising at least one air cleaner unit in communication with an interior air space. In one embodiment, an air quality system for an aircraft comprises a first set of air cleaner units in communication with a lower plenum of the aircraft recirculation system and a second set of air cleaner units in communication with an upper plenum of the aircraft recirculation system. Each air cleaner unit comprises at least one adsorbent unit in combination with at least one photocatalytic oxidation unit. In one embodiment, an air cleaner unit comprises a relatively weak adsorbent material upstream from a photocatalytic oxidation unit, and a relatively strong adsorbent material downstream from the photocatalytic oxidation unit. Methods for removing a pollutant from an air stream and for making an air cleaner unit are also disclosed.

US Patent:

54427193, Aug 15, 1995

Filed:

Jul 21, 1993

Appl. No.:

8/095278

Inventors:

Chin L. Chang - West Covina CA
Albert Choi - Agoura Hills CA
Sheri L. Douglas - Newbury Park CA

Assignee:

Litton Systems, Inc., a Delaware corporation - Woodland Hills CA

International Classification:

G02B 610

US Classification:

385 3

Abstract:

Lithium niobate waveguides for light and lithium niobate channel waveguide electro-optic phase modulators for light include sufficient lithium ions such that, when an electrical signal of known value is applied to such waveguides and modulators, the phase of light passing through the waveguide or the modulator changes to a desired value within a time period that is substantially instantaneous.

US Patent:

59405546, Aug 17, 1999

Filed:

May 23, 1997

Appl. No.:

8/862762

Inventors:

Chin L. Chang - Walnut CA
Chao Yung Yeh - Rosemead CA
Michel K. Smith - Cerritos CA
Keyth M. Smith - Mission Hills CA
Ricardo A. Rosette - Oxnard CA
Robert Straede - Woodland Hills CA

Assignee:

Lightwave Link, Inc. - Burbank CA

International Classification:

G02B 626

US Classification:

385 22

Abstract:

A method for coupling light from an input optical fiber into a selected one of a plurality of output optical fibers includes the steps of forming the input optical fiber to include a length of beam expanded fiber, arranging the plurality of output optical fibers in an array and moving an end of the input optical fiber into alignment with a selected one of the plurality of output optical fibers.

US Patent:

59068051, May 25, 1999

Filed:

Apr 30, 1997

Appl. No.:

8/848369

Inventors:

Chin Hsiung Chang - Palatine IL
Alan E. Van Til - Itasca IL
Zhenrong Qian - Randolph NJ

Assignee:

AlliedSignal Inc. - Morristown NJ

International Classification:

C01B 2120

US Classification:

423265

Abstract:

The invention provides stabilized hydroxylamine solutions. In particular, stabilized hydroxylamine solutions and processes for their preparation are provided in which the stabilizing compound is cyclohexanediaminetetraacetic acid, hydrochloride salts of thiamine, or mixtures thereof.

US Patent:

51931362, Mar 9, 1993

Filed:

Nov 26, 1991

Appl. No.:

7/799716

Inventors:

Chin L. Chang - West Covina CA
Daniel A. Niebauer - Woodland Hills CA
Albert Choi - Woodland Hills CA

Assignee:

Litton Systems, Inc. - Woodland Hills CA

International Classification:

G02B 610

US Classification:

385129

Abstract:

Methods for making proton-exchanged, multi-function integrated optics chips, preferably chips based on the stable, rhombohedral lithium niobate structure, and having substantially diffused protons, while being substantially free of microcracking and of internal stresses that can result in microcracking, and yet having optimally high electro-optic coefficients, include the steps of: forming a multi-function integrated optics chip substrate from a substrate such as lithium niobate; affixing a removable mask or mask pattern to at least one surface of the chip to form one or more proton-exchanged patterns of desired size and shape at the surface of the chip; treating the masked chip with a proton-exchanging acid such as benzoic acid at a temperature and for a time sufficient to cause substantial proton exchange at and below the unmasked surface of the chip, but for a time insufficient to create any microcracking or internal stresses that lead to microcracking in the chip; removing the mask or mask pattern from the chip; and thermally annealing the chip, in an oxygen-containing environment, at a temperature and for a time sufficient to diffuse the hydrogen ions at and near the surface of the chip substantially below its surface, at a temperature and for a time sufficient to optimize the polarization extinction ratio of the chip, and for a time and at a temperature sufficient to restore and to optimize the electro-optic coefficient and to reduce light and propagation losses in the chip.