Sung Ja Chung

US Patent:

7742317, Jun 22, 2010

Filed:

Dec 19, 2007

Appl. No.:

11/960253

Inventors:

Keming Chen - Torrance CA, US
Douglas S. Carlson - Hawthorne CA, US
Sung Chung - Fullerton CA, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

H02M 3/335
H02M 7/537

US Classification:

363 16, 363131

Abstract:

A method and apparatus for precharging a DC to DC power converter system is provided. The system includes a boost circuit for generating a boosted output voltage from an input voltage. The input voltage is monitored. A predetermined current limit is compared to a current in the boost circuit, and the current limited is increased when the input voltage is greater than a predetermined value.

US Patent:

8186093, May 29, 2012

Filed:

Nov 23, 2011

Appl. No.:

13/304082

Inventors:

Sung Giu Chung - McLean VA, US

Assignee:

International Trade and Technologies, Inc. - McLean VA

International Classification:

F41G 1/30
F41G 1/34

US Classification:

42113, 42119

Abstract:

A dot sight device is discussed, which includes a window frame enclosing a transparent lens; a body plate extending from the window frame; a light emitter disposed on the body plate, and configured to emit a light that forms a pattern on the transparent lens; two bolts to mount the dot sight device on various fire arms without tools; a large water drainage hole disposed on the body plate; multiple rails installed on the window frame to accommodate various equipment; an IR detector disposed at the front of the body plate; a caliber adjustment knob disposed on the body plate, and configured to enable targeting by firearms of different calibers; and a dual bullet drop compensation wheel disposed in the body plate for an accurate aiming and hitting targets using various firearms.

US Patent:

8296991, Oct 30, 2012

Filed:

Mar 30, 2012

Appl. No.:

13/436366

Inventors:

Sung Giu Chung - McLean VA, US

Assignee:

International Trade and Technologies, Inc. - McLean VA

International Classification:

F41G 1/00
F41G 1/30

US Classification:

42111, 42113

Abstract:

A digital machinegun optic (DMO) is discussed, which includes a digital module having a camera to obtain an image, a bullet drop compensation mount receiving the digital module in a detachable manner, and having a mounting solution, a caliber adjustment knob configured to enable a user to select a caliber that matches firearms of different calibers, and a dual bullet drop compensation wheel to allow the user to accurately hit a target by selecting a right distance to the target; a head mounted display module having a display portion to receive the image from the camera; and a control box module configured to control a display of the image on the display portion.

US Patent:

8505231, Aug 13, 2013

Filed:

Sep 26, 2012

Appl. No.:

13/627112

Inventors:

Sung Giu Chung - McLean VA, US

Assignee:

International Trade and Technologies, Inc. - McLean VA

International Classification:

F41G 1/30
F41G 1/34

US Classification:

42113, 42119

Abstract:

A digital machinegun optic (DMO) is discussed, which includes a digital module having a camera to obtain an image, a bullet drop compensation mount receiving the digital module in a detachable manner, and having a mounting solution, a caliber adjustment knob configured to enable a user to select a caliber that matches firearms of different calibers, and a dual bullet drop compensation wheel to allow the user to accurately hit a target by selecting a right distance to the target; a head mounted display module having a display portion to receive the image from the camera; and a control box module configured to control a display of the image on the display portion.

US Patent:

20130008072, Jan 10, 2013

Filed:

Jul 8, 2011

Appl. No.:

13/179154

Inventors:

Sung Giu CHUNG - McLean VA, US

International Classification:

F41G 1/00
G01C 3/08
F41C 27/00

US Classification:

42113

Abstract:

A dot sight device is discussed, which includes a window frame enclosing a transparent lens; a body plate extending from the window frame; a light emitter disposed on the body plate, and configured to emit a light that forms a pattern on the transparent lens; a brightness detector disposed at a later side of the body plate; a brightness detector switch configured to selectively activate the brightness detector; a brightness switch configured to enable a user to manually change a brightness of the pattern; a battery case disposed at a rear of the body plate; and a magnifier movably attached to the body plate.

US Patent:

56999283, Dec 23, 1997

Filed:

Jun 24, 1996

Appl. No.:

8/669135

Inventors:

Sung I. Chung - Los Angeles CA
Katalina Park - Los Angeles CA

International Classification:

B65D 1736

US Classification:

220269

Abstract:

The present invention is a disposable device which is attached to the tab of a conventional aluminum beverage can at the time of manufacture. When a consumer pulls the device upward, the tab is likewise pulled upward to a position in which the consumer can easily grasp the tab and consequently open the can. Two embodiments of the present invention are provided.

US Patent:

61041610, Aug 15, 2000

Filed:

May 10, 1999

Appl. No.:

9/307855

Inventors:

Sung Chung - Fullerton CA
Joseph Lansford - Los Angeles CA
John G. Hayes - Redondo Beach CA
Vito J. Marchione - Panorama City CA
Kwang Yi - Los Angeles CA

Assignee:

General Motors Corporation - Detroit MI

International Classification:

H02J 700
H01G 435

US Classification:

320109

Abstract:

AC isolation apparatus, such as is provided by an AC isolation capacitor disposed between unexposed and exposed portions of the chassis of a charging system or an electric vehicle. The AC isolation apparatus or capacitor provides a high impedance at 50/60 Hertz between the electric vehicle and the charging system, thus isolating their respective chassis grounds.

US Patent:

20210224111, Jul 22, 2021

Filed:

Dec 29, 2020

Appl. No.:

17/136435

Inventors:

- Lake Forest CA, US
Sung Chung - Walnut CA, US

International Classification:

G06F 9/48

Abstract:

Coordinating scheduled events and aperiodic events to execute objects to extract, transform, and load data from source systems to a structured data store. An event manager process executing on a server runtime utilizes event suspension, consolidation, and sequencing techniques to ensure that only one event process is executed for a particular time range.