Trung M Nguyen

Address:

2221 W Rowland Ave, Santa Ana, CA 92704

VIN:

1G1YY26U775118943

Make:

CHEVROLET

Model:

CORVETTE

Year:

2007

US Patent:

6888490, May 3, 2005

Filed:

Jul 20, 2004

Appl. No.:

10/894792

Inventors:

Oleg Brovko - Los Angeles CA, US
Eric Wayne Day - Lomita CA, US
Trung T. Nguyen - Huntington Beach CA, US
Jing Zhao - Moreno Valley CA, US
Mark S. Klemens - Los Angeles CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

G01S013/90

US Classification:

342 25A, 342 25 R, 342 25 F

Abstract:

A synthetic aperture radar (SAR) image of a wide coverage area is acquired during a frame containing a first plurality of ambiguities induced in the SAR image from radar scatterers within the area. The area is illuminated with radar pulses and a segmented receive antenna oriented towards the area. The segmented receive antenna has a second plurality of sub-apertures, where the second plurality of sub-apertures is larger than the first plurality of ambiguities. Each sub-aperture has its own receiver. The digital stream from each receiver is stored in a computer for the duration of the frame to obtain frame data. A SAR image is extracted from the frame data. The first plurality of ambiguities are identified from analysis of the frame data, and a correction is computed to account for the first plurality of ambiguities contained within the synthetic aperture image. The correction is applied to reduce distortions caused by the ambiguities in the SAR image.

US Patent:

D535166, Jan 16, 2007

Filed:

Apr 4, 2005

Appl. No.:

29/226900

Inventors:

Milo M. Kensrue - Dana Point CA, US
Trung Dinh Nguyen - Laguna Hills CA, US

Assignee:

M.K. Products, Inc. - Irvine CA

International Classification:

0805

US Classification:

D 8 30

US Patent:

7244909, Jul 17, 2007

Filed:

Apr 4, 2005

Appl. No.:

11/098773

Inventors:

Milo M. Kensrue - Dana Point CA, US
Trung Dinh Nguyen - Laguna Hills CA, US

Assignee:

M.K. Products, Inc. - Irvine CA

International Classification:

B23K 9/00
B23K 9/12

US Classification:

21913731, 2191377

Abstract:

Several aspects of an in-line welding gun are disclosed. In one aspect, the welding gun has a variable profile insulating boot disposed over the torch barrel of the gun. The variable profile insulating boot may include a molded material having varying thickness to provide the desired insulating properties. In another aspect of the welding gun, a speed control mechanism for the motor driving the wire feed assembly is positioned in a recess in the housing such that it reduces the risk of being unintentionally adjusted during operation of the welding gun. In another aspect of the welding gun, the wire feed mechanism features a feeder roller and an idler roller that may be separated without opening the housing of the welding gun. To separate the rollers, the user may depress a portion on the exterior of the housing to press on a pivotable lever on which the idler roller is disposed.

US Patent:

57422524, Apr 21, 1998

Filed:

Aug 26, 1996

Appl. No.:

8/703310

Inventors:

Trung T. Nguyen - Huntington Beach CA
Loan Taree Bui - Rosemead CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 502

US Classification:

342156

Abstract:

An apparatus for reducing the computational requirements for resolving ambiguity in interferometer measurements where the interferometer elements are arranged arbitrarily. Each of a plurality of interferometer elements each measures the phase of the incoming electromagnetic signal. The interferometer elements are each separated by lengths defined as baselines, which are sorted and processed in ascending order. Following initialization, for each baseline (92, 108), the phase measurements of the next baseline (92, 108) to be processed are estimated. If the measured phases (94-100, 110-118) of the next baseline (92, 108) falls within a predetermined range (104, 106) of the estimated phases, the phase is retained for estimating the phases of the next baseline. After a sufficient number of baselines have been processed, the angle of the incoming electromagnetic signal may be determined in accordance with the retained phases.

US Patent:

51913372, Mar 2, 1993

Filed:

Feb 25, 1992

Appl. No.:

7/841133

Inventors:

Oleg Brovko - Los Angeles CA
Trung T. Nguyen - Huntington Beach CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

G01S 1353
G01S 13532

US Classification:

342200

Abstract:

A maximum likelihood estimator and range-only-initialization target detection method employed to detect and resolve targets in a multislope linear frequency modulated waveform radar. The method resolves a large number of target returns without a large amount of signal processing and without creating a significant number of false alarms, or ghosts. The method simultaneously estimates range and doppler for each target. The method rejects undesired long-range targets that fold into target regions, and processes target regions of interest around a nearest target to reduce signal processing throughput requirements. Using a K out of N detection rule, the method detects targets that compete with mainlobe rain clutter, mainlobe ground clutter, and receiver leakage. The method simultaneously estimates target parameters and optimally resolves any number of targets. The method is limited only by the number of frequency modulation ranging slopes, the slope values, and the doppler filter resolution set by the radar waveform design.

US Patent:

57013993, Dec 23, 1997

Filed:

Dec 20, 1996

Appl. No.:

8/771311

Inventors:

S. Daniel Lee - San Gabriel CA
Trung D. Nguyen - Tomball TX
Mary P. Czerwinski - The Woodlands TX

Assignee:

Inference Corporation - El Segundo CA

International Classification:

G06F 1518

US Classification:

395 51

Abstract:

A system in which a case-based search engine is integrated into a "help" database. The help database may be organized in a predetermined manner and converted by a computer program into a case-based format. An operator of a "help" program (e. g. , a user who desires on-line help) may request a case-based search of the case-base using case-based methods. The case-based search provides a set of likely cases, i. e. , help topics, from among which the operator may select the next help topic to view. The system may also present matched objects in response to the query, may respond to iterative refinement of the query (in similar manner to known iterative case-based methods) and may order matched objects by quality of match.

US Patent:

20140232581, Aug 21, 2014

Filed:

Feb 20, 2013

Appl. No.:

13/772217

Inventors:

- Waltham MA, US
Oleg Brovko - Los Angeles CA, US
Alison Kim - Palos Verdes Estates CA, US
Trung T. Nguyen - Huntington Beach CA, US

Assignee:

RAYTHEON COMPANY - Waltham MA

International Classification:

H03M 1/12

US Classification:

341155

Abstract:

System and method for converting a high bandwidth analog signal to a digital signal including: receiving the high bandwidth analog signal; splitting the high bandwidth analog signal to M parallel channels; delaying the split signal in each channel with N*T delays, respectively; sampling each M delayed signals by M relatively prime sampling rate, wherein the sampling rate for each M delayed signal is smaller than the Nyquist frequency of the high bandwidth analog signal; upsampling each M sampled signal, wherein the upsampling rate for each M sampled signal satisfies the Nyquist frequency of the high bandwidth analog signal; combining the M up sampled signals into a combined signal; and reconstructing the combined signal to generate a digital signal representing the high bandwidth analog signal.