Joon H Park

US Patent:

6637988, Oct 28, 2003

Filed:

Nov 15, 2001

Appl. No.:

10/001774

Inventors:

Joon Park - Glendale CA 91202

International Classification:

B23B 4900

US Classification:

408103, 408115 R

Abstract:

The pocket drilling fixture has a clamp base with a clamp face thereon. Opposing it is a clamp body with an opposing clamp face. Clamp structure, including a clamp arm on the base urges the faces together to clamp over a workpiece therebetween in a clamping direction. A guide carrier is mounted on the base to move in the direction at a right angle to the clamping direction. The base has a turret thereon with stops which can be positioned beneath the guide carrier to set its height above the base so that height can be preselected, depending on the workpiece thickness.

US Patent:

6659695, Dec 9, 2003

Filed:

Apr 9, 2001

Appl. No.:

09/828682

Inventors:

Joon Park - Glendale CA 91202

International Classification:

B23B 4900

US Classification:

408103, 408115 R

Abstract:

The woodworking doweling jig has first and second clamp members slidably mounted on guide rods. Drill guide holes are provided in the clamp members or in separately adjustable drill guide members. When the separate drill guide members are provided, they are slidably mounted on the guide rods to maintain alignment. Dowel guide slots are provided in an alignment member which may be part of the upper clamp member. The alignment member has dowel guide slots in it which are in alignment with the drill guide holes in the guide member(s). Adjustment can provide for dowel drilling the same distance from one workpiece surface for aligning the surface. The jig can also be used for mounting the end of one plank against the side of a second plank either at its end or away from the end.

US Patent:

6985953, Jan 10, 2006

Filed:

Nov 30, 1999

Appl. No.:

09/451090

Inventors:

Ravi Sandhu - Fairfax VA, US
Joon S. Park - Springfield VA, US

Assignee:

George Mason University - Fairfax VA

International Classification:

G06F 11/00

US Classification:

709229, 709225, 709226, 713201, 713202

Abstract:

The present invention relates to methods and systems for creating secure cookies. The methods can be used to create, receive, and transmit secure cookies, confidential cookies, and authentication cookies.

US Patent:

7098576, Aug 29, 2006

Filed:

Jan 10, 2005

Appl. No.:

11/031950

Inventors:

Robert C. Allison - Rancho Palos Verdes CA, US
Ron K. Nakahira - Fullerton CA, US
Joon Park - Gardena CA, US
Brian H. Tran - Rosemead CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01L 41/08

US Classification:

310328, 310331

Abstract:

A micro-electro-mechanical device including a first substrate; a first contact disposed on a first surface of the substrate; a piezoelectric actuator disposed over the first surface of the substrate; a second contact coupled to the actuator and disposed in proximity to the first contact; a gap control mechanism disposed between the substrate and the actuator for limiting movement of the first contact relative to the second contact. In the exemplary embodiment, the gap control mechanism is a gap control stop constructed of dielectric material. In practice, plural stops are used. In the exemplary embodiment, plural thermosonic bonds are used to connect the actuator to the first substrate. A second substrate is disposed over the piezo-electric actuator. The second substrate has wells over the bonds to facilitate application of a bonding tool to the bonds. The gap control mechanism provides consistent height control between a flipped chip and its base substrate without exposing the assembly to high temperatures.

US Patent:

7132723, Nov 7, 2006

Filed:

Nov 14, 2002

Appl. No.:

10/294413

Inventors:

Joon Park - Gardena CA, US
Ron K. Nakahira - Buena Park CA, US
Robert C. Allison - Rancho P.V. CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01L 21/00

US Classification:

257419, 257602, 310319, 3612833

Abstract:

A radio frequency (RF) micro electro-mechanical system (MEMS) device and method of making same are provided, the device including an RF circuit substrate and an RF conducting path disposed on the RF circuit substrate, a piezoelectric thin film actuator, and a conducting path electrode. The piezoelectric thin film actuator has a proximal end that is fixed relative to the RF circuit substrate and a cantilever end that is spaced from the RF circuit substrate. The conducting path electrode is disposed on the cantilever end of the piezoelectric thin film actuator. The cantilever end of the piezoelectric thin film actuator is movable between a first position whereat the conducting path electrode is spaced from the RF path electrode and a second position whereat the conducting path electrode is spaced from the RF path electrode a second distance, wherein the second distance is less than the first distance. The RF MEMS device is particularly useful as a tunable capacitor. The RF MEMS device requires lower operating voltage, and provides variable RF tuning capacity, fewer stiction problems, simplified fabrication, and an improved switching time.

US Patent:

7134814, Nov 14, 2006

Filed:

Sep 23, 2003

Appl. No.:

10/668659

Inventors:

Joon Park - Glendale CA, US

International Classification:

B23B 47/28

US Classification:

408103, 408115 R

Abstract:

A pocket drilling fixture has a clamp base with a clamping face formed thereon. Opposing the clamp base is a clamp body with an opposing clamping face. Clamp structure interengages the clamp body and the base. The clamp structure includes a clamp actuator positioned adjacent to the base to move the clamp body in a clamping direction. A guide carrier has at least one drill guide disposed therein, and has an axis which intersects a plane defined by the clamping face. The guide carrier is mounted on the base to move in the direction parallel to the plane. The base may have formed thereon a turret having multiple surfaces for height adjustment. The turret may be positioned under the guide carrier to set its height above the base so that height can be preselected, depending on the workpiece thickness.

US Patent:

7168877, Jan 30, 2007

Filed:

Jan 23, 2004

Appl. No.:

10/764085

Inventors:

Joon Park - Glendale CA, US

International Classification:

B05C 11/00

US Classification:

401266, 401 9, 118254

Abstract:

A brush applicator forms a tapered inner wall and inwardly extended flange inside of a nozzle, which secures either molded or crimped brush assembly. Two edge applicators apply a substantially uniform thin layer of adhesive or glue only on the edge surface of a workpiece. A first edge applicator applies glue through an exit and a second edge applicator has a roller with side flanges and with a reduced portion in-between. A flat surface applicator implements may have plural vanes and channels inside of two outer walls to distribute adhesive to a wider flat exit. A biscuit applicator applies glue on two side surfaces of elliptical slots that are formed by biscuit cutters. The glue flows through plural vanes or plural transversely positioned openings and passes to form two opposite layers of glue. A dowel applicator applies a thin substantially uniform layer of glue on the wall of a dowel-receiving hole prior to installation of dowel pins. The glue is applied using a cylindrical nozzle body with plural projections and a reduced diameter portion.

US Patent:

7293098, Nov 6, 2007

Filed:

Dec 19, 2005

Appl. No.:

11/303927

Inventors:

Ravi Sandhu - Fairfax VA, US
Joon S. Park - Springfield VA, US

Assignee:

George Mason Unversity - Fairfax VA

International Classification:

G06F 11/00

US Classification:

709229, 709217, 709227, 707 10, 713300, 713310

Abstract:

The present invention relates to methods and systems for creating secure cookies. The methods can be used to create, receive, and transmit secure cookies, confidential cookies, and authentication cookies.